20903742 has 24 divisors (see below), whose sum is σ = 46517016. Its totient is φ = 6779376.

The previous prime is 20903741. The next prime is 20903777. The reversal of 20903742 is 24730902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20903741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15028 + ... + 16359.

It is an arithmetic number, because the mean of its divisors is an integer number (1938209).

Almost surely, 2^20903742 is an apocalyptic number.

20903742 is an abundant number, since it is smaller than the sum of its proper divisors (25613274).

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

20903742 is a wasteful number, since it uses less digits than its factorization.

20903742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31432 (or 31429 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 20903742 is about 4572.0610232148. The cubic root of 20903742 is about 275.4702345854.

It can be divided in two parts, 2090 and 3742, that added together give a cube (5832 = 18³).

The spelling of 20903742 in words is "twenty million, nine hundred three thousand, seven hundred forty-two".