21956546038 has 32 divisors (see below), whose sum is σ = 38504669184. Its totient is φ = 9194396832.

The previous prime is 21956546011. The next prime is 21956546041. The reversal of 21956546038 is 83064565912.

It is a junction number, because it is equal to n+sod(n) for n = 21956545982 and 21956546000.

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, 371920 + ... + 426892.

It is an arithmetic number, because the mean of its divisors is an integer number (1203270912).

Almost surely, 2^21956546038 is an apocalyptic number.

21956546038 is a deficient number, since it is larger than the sum of its proper divisors (16548123146).

21956546038 is a wasteful number, since it uses less digits than its factorization.

21956546038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55636.

The product of its (nonzero) digits is 1555200, while the sum is 49.

The spelling of 21956546038 in words is "twenty-one billion, nine hundred fifty-six million, five hundred forty-six thousand, thirty-eight".