19920738 has 16 divisors (see below), whose sum is σ = 41215680. Its totient is φ = 6411216.

The previous prime is 19920713. The next prime is 19920743. The reversal of 19920738 is 83702991.

It is a junction number, because it is equal to n+sod(n) for n = 19920696 and 19920705.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57070 + ... + 57417.

It is an arithmetic number, because the mean of its divisors is an integer number (2575980).

Almost surely, 2^19920738 is an apocalyptic number.

19920738 is an abundant number, since it is smaller than the sum of its proper divisors (21294942).

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

19920738 is a wasteful number, since it uses less digits than its factorization.

19920738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114521.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 19920738 is about 4463.2653965454. The cubic root of 19920738 is about 271.0827032976.

The spelling of 19920738 in words is "nineteen million, nine hundred twenty thousand, seven hundred thirty-eight".