21255446102 has 16 divisors (see below), whose sum is σ = 34784862912. Its totient is φ = 9660670920.

The previous prime is 21255446089. The next prime is 21255446123. The reversal of 21255446102 is 20164455212.

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, 237533 + ... + 314535.

It is an arithmetic number, because the mean of its divisors is an integer number (2174053932).

Almost surely, 2^21255446102 is an apocalyptic number.

21255446102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21255446102 is a deficient number, since it is larger than the sum of its proper divisors (13529416810).

21255446102 is a wasteful number, since it uses less digits than its factorization.

21255446102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89563.

The product of its (nonzero) digits is 19200, while the sum is 32.

The spelling of 21255446102 in words is "twenty-one billion, two hundred fifty-five million, four hundred forty-six thousand, one hundred two".