21162948390 has 48 divisors (see below), whose sum is σ = 55086612048. Its totient is φ = 5636996928.

The previous prime is 21162948383. The next prime is 21162948421. The reversal of 21162948390 is 9384926112.

21162948390 is a `hidden beast` number, since 2 + 1 + 162 + 9 + 483 + 9 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55132 + ... + 212991.

It is an arithmetic number, because the mean of its divisors is an integer number (1147637751).

Almost surely, 2^21162948390 is an apocalyptic number.

21162948390 is an abundant number, since it is smaller than the sum of its proper divisors (33923663658).

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

21162948390 is a wasteful number, since it uses less digits than its factorization.

21162948390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269013 (or 269010 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 21162948390 in words is "twenty-one billion, one hundred sixty-two million, nine hundred forty-eight thousand, three hundred ninety".