21000241420020 has 48 divisors (see below), whose sum is σ = 65334084419520. Its totient is φ = 5600064378528.

The previous prime is 21000241419979. The next prime is 21000241420033. The reversal of 21000241420020 is 2002414200012.

21000241420020 is a `hidden beast` number, since 2 + 1 + 0 + 0 + 0 + 241 + 420 + 0 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21000241419975 and 21000241420002.

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, 19444667442 + ... + 19444668521.

It is an arithmetic number, because the mean of its divisors is an integer number (1361126758740).

Almost surely, 2^{21000241420020} is an apocalyptic number.

21000241420020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21000241420020 is an abundant number, since it is smaller than the sum of its proper divisors (44333842999500).

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

21000241420020 is a wasteful number, since it uses less digits than its factorization.

21000241420020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38889335981 (or 38889335973 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21000241420020 its reverse (2002414200012), we get a palindrome (23002655620032).

The spelling of 21000241420020 in words is "twenty-one trillion, two hundred forty-one million, four hundred twenty thousand, twenty".