20269613 has 16 divisors (see below), whose sum is σ = 25057536. Its totient is φ = 15966720.

The previous prime is 20269603. The next prime is 20269619. The reversal of 20269613 is 31696202.

It is not a de Polignac number, because 20269613 - 2²⁴ = 3492397 is a prime.

It is a super-2 number, since 2×20269613² = 821714422339538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20269619) 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, 31808 + ... + 32438.

It is an arithmetic number, because the mean of its divisors is an integer number (1566096).

Almost surely, 2^20269613 is an apocalyptic number.

It is an amenable number.

20269613 is a deficient number, since it is larger than the sum of its proper divisors (4787923).

20269613 is a wasteful number, since it uses less digits than its factorization.

20269613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 20269613 is about 4502.1786948099. The cubic root of 20269613 is about 272.6560585207.

The spelling of 20269613 in words is "twenty million, two hundred sixty-nine thousand, six hundred thirteen".