20507469 has 12 divisors (see below), whose sum is σ = 27686016. Its totient is φ = 13502368.

The previous prime is 20507429. The next prime is 20507471. The reversal of 20507469 is 96470502.

It is not a de Polignac number, because 20507469 - 2⁹ = 20506957 is a prime.

It is a super-2 number, since 2×20507469² = 841112569571922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20507419) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23332 + ... + 24194.

It is an arithmetic number, because the mean of its divisors is an integer number (2307168).

Almost surely, 2^20507469 is an apocalyptic number.

It is an amenable number.

20507469 is a deficient number, since it is larger than the sum of its proper divisors (7178547).

20507469 is an frugal number, since it uses more digits than its factorization.

20507469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044 (or 955 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 20507469 is about 4528.5173070222. The cubic root of 20507469 is about 273.7184179908.

The spelling of 20507469 in words is "twenty million, five hundred seven thousand, four hundred sixty-nine".