20940903 has 32 divisors (see below), whose sum is σ = 32440320. Its totient is φ = 13335840.

The previous prime is 20940901. The next prime is 20940967. The reversal of 20940903 is 30904902.

It is not a de Polignac number, because 20940903 - 2¹ = 20940901 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20940901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106201 + ... + 106397.

It is an arithmetic number, because the mean of its divisors is an integer number (1013760).

Almost surely, 2^20940903 is an apocalyptic number.

20940903 is a deficient number, since it is larger than the sum of its proper divisors (11499417).

20940903 is a wasteful number, since it uses less digits than its factorization.

20940903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364 (or 358 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 20940903 is about 4576.1231408256. The cubic root of 20940903 is about 275.6333742654.

The spelling of 20940903 in words is "twenty million, nine hundred forty thousand, nine hundred three".