921236838692 has 12 divisors (see below), whose sum is σ = 1706997671820. Its totient is φ = 433523218176.

The previous prime is 921236838673. The next prime is 921236838703. The reversal of 921236838692 is 296838632129.

It can be written as a sum of positive squares in 2 ways, for example, as 438275776576 + 482961062116 = 662024^2 + 694954^2 .

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, 6773800217 + ... + 6773800352.

It is an arithmetic number, because the mean of its divisors is an integer number (142249805985).

Almost surely, 2^921236838692 is an apocalyptic number.

It is an amenable number.

921236838692 is a deficient number, since it is larger than the sum of its proper divisors (785760833128).

921236838692 is a wasteful number, since it uses less digits than its factorization.

921236838692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13547600590 (or 13547600588 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 59.

The spelling of 921236838692 in words is "nine hundred twenty-one billion, two hundred thirty-six million, eight hundred thirty-eight thousand, six hundred ninety-two".