20930495 has 16 divisors (see below), whose sum is σ = 26943840. Its totient is φ = 15560064.

The previous prime is 20930471. The next prime is 20930501. The reversal of 20930495 is 59403902.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20930495 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2957 + ... + 7113.

It is an arithmetic number, because the mean of its divisors is an integer number (1683990).

Almost surely, 2^20930495 is an apocalyptic number.

20930495 is a deficient number, since it is larger than the sum of its proper divisors (6013345).

20930495 is a wasteful number, since it uses less digits than its factorization.

20930495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4234.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 20930495 is about 4574.9857923277. The cubic root of 20930495 is about 275.5877018069.

The spelling of 20930495 in words is "twenty million, nine hundred thirty thousand, four hundred ninety-five".