21256241204 has 12 divisors (see below), whose sum is σ = 40580096928. Its totient is φ = 9661927800.

The previous prime is 21256241189. The next prime is 21256241207. The reversal of 21256241204 is 40214265212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21256241207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241548152 + ... + 241548239.

It is an arithmetic number, because the mean of its divisors is an integer number (3381674744).

Almost surely, 2^21256241204 is an apocalyptic number.

It is an amenable number.

21256241204 is a deficient number, since it is larger than the sum of its proper divisors (19323855724).

21256241204 is a wasteful number, since it uses less digits than its factorization.

21256241204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483096406 (or 483096404 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The spelling of 21256241204 in words is "twenty-one billion, two hundred fifty-six million, two hundred forty-one thousand, two hundred four".