20492913 has 16 divisors (see below), whose sum is σ = 31324160. Its totient is φ = 11673936.

The previous prime is 20492911. The next prime is 20492921. The reversal of 20492913 is 31929402.

It is not a de Polignac number, because 20492913 - 2¹ = 20492911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20492911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6378 + ... + 9036.

It is an arithmetic number, because the mean of its divisors is an integer number (1957760).

Almost surely, 2^20492913 is an apocalyptic number.

It is an amenable number.

20492913 is a deficient number, since it is larger than the sum of its proper divisors (10831247).

20492913 is a wasteful number, since it uses less digits than its factorization.

20492913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3036.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 20492913 is about 4526.9098731916. The cubic root of 20492913 is about 273.6536417813.

The spelling of 20492913 in words is "twenty million, four hundred ninety-two thousand, nine hundred thirteen".