20502428 has 12 divisors (see below), whose sum is σ = 36017520. Its totient is φ = 10211712.

The previous prime is 20502401. The next prime is 20502479. The reversal of 20502428 is 82420502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8693 + ... + 10796.

It is an arithmetic number, because the mean of its divisors is an integer number (3001460).

Almost surely, 2^20502428 is an apocalyptic number.

It is an amenable number.

20502428 is a deficient number, since it is larger than the sum of its proper divisors (15515092).

20502428 is a wasteful number, since it uses less digits than its factorization.

20502428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19756 (or 19754 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 20502428 is about 4527.9606888753. The cubic root of 20502428 is about 273.6959883154.

The spelling of 20502428 in words is "twenty million, five hundred two thousand, four hundred twenty-eight".