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21150420432 = 2433319132761
BaseRepresentation
bin10011101100101010…
…011100110111010000
32000121000020200101220
4103230222130313100
5321304001423212
613414422525040
71346061415221
oct235452346720
960530220356
1021150420432
118a73951a09
124123296780
131cc0b3019b
141048dcb248
1583bc6138c
hex4eca9cdd0

21150420432 has 40 divisors (see below), whose sum is σ = 54655460160. Its totient is φ = 7047962880.

The previous prime is 21150420419. The next prime is 21150420479. The reversal of 21150420432 is 23402405112.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92932 + ... + 225692.

It is an arithmetic number, because the mean of its divisors is an integer number (1366386504).

Almost surely, 221150420432 is an apocalyptic number.

It is an amenable number.

21150420432 is an abundant number, since it is smaller than the sum of its proper divisors (33505039728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21150420432 is a wasteful number, since it uses less digits than its factorization.

21150420432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136091 (or 136085 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 21150420432 its reverse (23402405112), we get a palindrome (44552825544).

The spelling of 21150420432 in words is "twenty-one billion, one hundred fifty million, four hundred twenty thousand, four hundred thirty-two".

Divisors: 1 2 3 4 6 8 12 16 24 48 3319 6638 9957 13276 19914 26552 39828 53104 79656 132761 159312 265522 398283 531044 796566 1062088 1593132 2124176 3186264 6372528 440633759 881267518 1321901277 1762535036 2643802554 3525070072 5287605108 7050140144 10575210216 21150420432