20538742 has 12 divisors (see below), whose sum is σ = 35838180. Its totient is φ = 8802276.

The previous prime is 20538691. The next prime is 20538773. The reversal of 20538742 is 24783502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 104692 + ... + 104887.

It is an arithmetic number, because the mean of its divisors is an integer number (2986515).

Almost surely, 2^20538742 is an apocalyptic number.

20538742 is a deficient number, since it is larger than the sum of its proper divisors (15299438).

20538742 is a wasteful number, since it uses less digits than its factorization.

20538742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209595 (or 209588 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 20538742 is about 4531.9688878014. The cubic root of 20538742 is about 273.8574835602.

The spelling of 20538742 in words is "twenty million, five hundred thirty-eight thousand, seven hundred forty-two".