20539704 has 16 divisors (see below), whose sum is σ = 51349320. Its totient is φ = 6846560.

The previous prime is 20539679. The next prime is 20539709. The reversal of 20539704 is 40793502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20539709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 427887 + ... + 427934.

Almost surely, 2^20539704 is an apocalyptic number.

20539704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20539704 is an abundant number, since it is smaller than the sum of its proper divisors (30809616).

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

20539704 is a wasteful number, since it uses less digits than its factorization.

20539704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855830 (or 855826 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 20539704 is about 4532.0750214444. The cubic root of 20539704 is about 273.8617591675.

The spelling of 20539704 in words is "twenty million, five hundred thirty-nine thousand, seven hundred four".