20138796 has 36 divisors (see below), whose sum is σ = 51046632. Its totient is φ = 6694464.

The previous prime is 20138743. The next prime is 20138801. The reversal of 20138796 is 69783102.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×20138796² = 811142208659232, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20138796.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20656 + ... + 21608.

It is an arithmetic number, because the mean of its divisors is an integer number (1417962).

Almost surely, 2^20138796 is an apocalyptic number.

It is an amenable number.

20138796 is an abundant number, since it is smaller than the sum of its proper divisors (30907836).

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

20138796 is a wasteful number, since it uses less digits than its factorization.

20138796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550 (or 1545 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 20138796 is about 4487.6269898466. The cubic root of 20138796 is about 272.0682318732.

The spelling of 20138796 in words is "twenty million, one hundred thirty-eight thousand, seven hundred ninety-six".