21368150040 has 64 divisors (see below), whose sum is σ = 66314959200. Its totient is φ = 5501683712.

The previous prime is 21368150033. The next prime is 21368150087. The reversal of 21368150040 is 4005186312.

It is a super-2 number, since 2×21368150040² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3066657 + ... + 3073616.

Almost surely, 2^21368150040 is an apocalyptic number.

21368150040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21368150040 is an abundant number, since it is smaller than the sum of its proper divisors (44946809160).

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

21368150040 is a wasteful number, since it uses less digits than its factorization.

21368150040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6140316 (or 6140312 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The spelling of 21368150040 in words is "twenty-one billion, three hundred sixty-eight million, one hundred fifty thousand, forty".