21113202503446 has 32 divisors (see below), whose sum is σ = 34010183931840. Its totient is φ = 9794302811136.

The previous prime is 21113202503423. The next prime is 21113202503501. The reversal of 21113202503446 is 64430520231112.

It is a Harshad number since it is a multiple of its sum of digits (34).

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, 2400100 + ... + 6927256.

It is an arithmetic number, because the mean of its divisors is an integer number (1062818247870).

Almost surely, 2^{21113202503446} is an apocalyptic number.

21113202503446 is a deficient number, since it is larger than the sum of its proper divisors (12896981428394).

21113202503446 is a wasteful number, since it uses less digits than its factorization.

21113202503446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4529128.

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 21113202503446 its reverse (64430520231112), we get a palindrome (85543722734558).

The spelling of 21113202503446 in words is "twenty-one trillion, one hundred thirteen billion, two hundred two million, five hundred three thousand, four hundred forty-six".