20542903 has 8 divisors (see below), whose sum is σ = 20847200. Its totient is φ = 20240928.

The previous prime is 20542889. The next prime is 20542939. The reversal of 20542903 is 30924502.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20542903 - 2¹³ = 20534711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20542993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24550 + ... + 25372.

It is an arithmetic number, because the mean of its divisors is an integer number (2605900).

Almost surely, 2^20542903 is an apocalyptic number.

20542903 is a deficient number, since it is larger than the sum of its proper divisors (304297).

20542903 is a wasteful number, since it uses less digits than its factorization.

20542903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 20542903 is about 4532.4279365479. The cubic root of 20542903 is about 273.8759761574.

The spelling of 20542903 in words is "twenty million, five hundred forty-two thousand, nine hundred three".