20958903 has 24 divisors (see below), whose sum is σ = 35257248. Its totient is φ = 11748672.

The previous prime is 20958863. The next prime is 20958907. The reversal of 20958903 is 30985902.

It is not a de Polignac number, because 20958903 - 2¹² = 20954807 is a prime.

It is a super-2 number, since 2×20958903² = 878551229926818, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20958907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 201 + ... + 6477.

It is an arithmetic number, because the mean of its divisors is an integer number (1469052).

Almost surely, 2^20958903 is an apocalyptic number.

20958903 is a deficient number, since it is larger than the sum of its proper divisors (14298345).

20958903 is a wasteful number, since it uses less digits than its factorization.

20958903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6343 (or 6340 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 20958903 is about 4578.0894486674. The cubic root of 20958903 is about 275.7123262869.

The spelling of 20958903 in words is "twenty million, nine hundred fifty-eight thousand, nine hundred three".