20502744 has 32 divisors (see below), whose sum is σ = 52451520. Its totient is φ = 6674976.

The previous prime is 20502733. The next prime is 20502751. The reversal of 20502744 is 44720502.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8902 + ... + 10965.

It is an arithmetic number, because the mean of its divisors is an integer number (1639110).

Almost surely, 2^20502744 is an apocalyptic number.

20502744 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20502744 is an abundant number, since it is smaller than the sum of its proper divisors (31948776).

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

20502744 is a wasteful number, since it uses less digits than its factorization.

20502744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19919 (or 19915 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 20502744 is about 4527.9955830367. The cubic root of 20502744 is about 273.6973944495.

The spelling of 20502744 in words is "twenty million, five hundred two thousand, seven hundred forty-four".