21055037338 has 8 divisors (see below), whose sum is σ = 32955710688. Its totient is φ = 10069800444.

The previous prime is 21055037329. The next prime is 21055037347. The reversal of 21055037338 is 83373055012.

It is an interprime number because it is at equal distance from previous prime (21055037329) and next prime (21055037347).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21055037297 and 21055037306.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228859056 + ... + 228859147.

It is an arithmetic number, because the mean of its divisors is an integer number (4119463836).

Almost surely, 2^21055037338 is an apocalyptic number.

21055037338 is a deficient number, since it is larger than the sum of its proper divisors (11900673350).

21055037338 is a wasteful number, since it uses less digits than its factorization.

21055037338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457718228.

The product of its (nonzero) digits is 75600, while the sum is 37.

The spelling of 21055037338 in words is "twenty-one billion, fifty-five million, thirty-seven thousand, three hundred thirty-eight".