20901542 has 8 divisors (see below), whose sum is σ = 31581576. Its totient is φ = 10374352.

The previous prime is 20901509. The next prime is 20901581. The reversal of 20901542 is 24510902.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 37868 + ... + 38415.

It is an arithmetic number, because the mean of its divisors is an integer number (3947697).

Almost surely, 2^20901542 is an apocalyptic number.

20901542 is a deficient number, since it is larger than the sum of its proper divisors (10680034).

20901542 is a wasteful number, since it uses less digits than its factorization.

20901542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76422.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 20901542 is about 4571.8204251698. The cubic root of 20901542 is about 275.4605703543.

The spelling of 20901542 in words is "twenty million, nine hundred one thousand, five hundred forty-two".