21328970862 has 16 divisors (see below), whose sum is σ = 43137245520. Its totient is φ = 7029772992.

The previous prime is 21328970849. The next prime is 21328970869. The reversal of 21328970862 is 26807982312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21328970869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19970413 + ... + 19971480.

It is an arithmetic number, because the mean of its divisors is an integer number (2696077845).

Almost surely, 2^21328970862 is an apocalyptic number.

21328970862 is an abundant number, since it is smaller than the sum of its proper divisors (21808274658).

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

21328970862 is a wasteful number, since it uses less digits than its factorization.

21328970862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39941987.

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 21328970862 in words is "twenty-one billion, three hundred twenty-eight million, nine hundred seventy thousand, eight hundred sixty-two".