20273913 has 18 divisors (see below), whose sum is σ = 32190522. Its totient is φ = 12286560.

The previous prime is 20273909. The next prime is 20273927. The reversal of 20273913 is 31937202.

It can be written as a sum of positive squares in only one way, i.e., 20142144 + 131769 = 4488^2 + 363^2 .

It is not a de Polignac number, because 20273913 - 2² = 20273909 is a prime.

It is a super-2 number, since 2×20273913² = 822063096663138, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20273963) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8220 + ... + 10397.

Almost surely, 2^20273913 is an apocalyptic number.

It is an amenable number.

20273913 is a deficient number, since it is larger than the sum of its proper divisors (11916609).

20273913 is a wasteful number, since it uses less digits than its factorization.

20273913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18645 (or 18631 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 20273913 is about 4502.6562160574. The cubic root of 20273913 is about 272.6753375955.

The spelling of 20273913 in words is "twenty million, two hundred seventy-three thousand, nine hundred thirteen".