21901215162 has 8 divisors (see below), whose sum is σ = 43802430336. Its totient is φ = 7300405052.

The previous prime is 21901215143. The next prime is 21901215179. The reversal of 21901215162 is 26151210912.

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

21901215162 is an admirable number.

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, 1825101258 + ... + 1825101269.

It is an arithmetic number, because the mean of its divisors is an integer number (5475303792).

Almost surely, 2^21901215162 is an apocalyptic number.

21901215162 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21901215162 is a wasteful number, since it uses less digits than its factorization.

21901215162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3650202532.

The product of its (nonzero) digits is 2160, while the sum is 30.

The spelling of 21901215162 in words is "twenty-one billion, nine hundred one million, two hundred fifteen thousand, one hundred sixty-two".