20507460 has 48 divisors (see below), whose sum is σ = 60446400. Its totient is φ = 5180544.

The previous prime is 20507429. The next prime is 20507471. The reversal of 20507460 is 6470502.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20507460.

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, 7855 + ... + 10134.

It is an arithmetic number, because the mean of its divisors is an integer number (1259300).

Almost surely, 2^20507460 is an apocalyptic number.

20507460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20507460 is an abundant number, since it is smaller than the sum of its proper divisors (39938940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20507460 is a wasteful number, since it uses less digits than its factorization.

20507460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18020 (or 18018 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 20507460 is about 4528.5163133194. The cubic root of 20507460 is about 273.7183779491.

Adding to 20507460 its reverse (6470502), we get a palindrome (26977962).

The spelling of 20507460 in words is "twenty million, five hundred seven thousand, four hundred sixty".