21862790361 has 12 divisors (see below), whose sum is σ = 31744926720. Its totient is φ = 14498882520.

The previous prime is 21862790329. The next prime is 21862790423. The reversal of 21862790361 is 16309726812.

21862790361 is a `hidden beast` number, since 2 + 18 + 6 + 279 + 0 + 361 = 666.

It is not a de Polignac number, because 21862790361 - 2⁵ = 21862790329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21862770361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6357441 + ... + 6360878.

It is an arithmetic number, because the mean of its divisors is an integer number (2645410560).

Almost surely, 2^21862790361 is an apocalyptic number.

It is an amenable number.

21862790361 is a deficient number, since it is larger than the sum of its proper divisors (9882136359).

21862790361 is a wasteful number, since it uses less digits than its factorization.

21862790361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12718516 (or 12718513 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 21862790361 in words is "twenty-one billion, eight hundred sixty-two million, seven hundred ninety thousand, three hundred sixty-one".