20726384 has 20 divisors (see below), whose sum is σ = 45894384. Its totient is φ = 8882688.

The previous prime is 20726371. The next prime is 20726393. The reversal of 20726384 is 48362702.

It is a self number, because there is not a number n which added to its sum of digits gives 20726384.

It is a congruent number.

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, 92417 + ... + 92640.

Almost surely, 2^20726384 is an apocalyptic number.

It is an amenable number.

20726384 is an abundant number, since it is smaller than the sum of its proper divisors (25168000).

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

20726384 is a wasteful number, since it uses less digits than its factorization.

20726384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185072 (or 185066 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 20726384 is about 4552.6238588313. The cubic root of 20726384 is about 274.6889441614.

The spelling of 20726384 in words is "twenty million, seven hundred twenty-six thousand, three hundred eighty-four".