20498715 has 12 divisors (see below), whose sum is σ = 35531184. Its totient is φ = 10932624.

The previous prime is 20498707. The next prime is 20498741. The reversal of 20498715 is 51789402.

It is not a de Polignac number, because 20498715 - 2³ = 20498707 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20498715.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 227719 + ... + 227808.

It is an arithmetic number, because the mean of its divisors is an integer number (2960932).

Almost surely, 2^20498715 is an apocalyptic number.

20498715 is a deficient number, since it is larger than the sum of its proper divisors (15032469).

20498715 is a wasteful number, since it uses less digits than its factorization.

20498715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455538 (or 455535 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 20498715 is about 4527.5506623339. The cubic root of 20498715 is about 273.6794651577.

The spelling of 20498715 in words is "twenty million, four hundred ninety-eight thousand, seven hundred fifteen".