20492428 has 24 divisors (see below), whose sum is σ = 39569040. Its totient is φ = 9208320.

The previous prime is 20492399. The next prime is 20492441. The reversal of 20492428 is 82429402.

It is a self number, because there is not a number n which added to its sum of digits gives 20492428.

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, 1300 + ... + 6532.

It is an arithmetic number, because the mean of its divisors is an integer number (1648710).

Almost surely, 2^20492428 is an apocalyptic number.

It is an amenable number.

20492428 is a deficient number, since it is larger than the sum of its proper divisors (19076612).

20492428 is a wasteful number, since it uses less digits than its factorization.

20492428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5337 (or 5335 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 20492428 is about 4526.8563043242. The cubic root of 20492428 is about 273.6514829364.

The spelling of 20492428 in words is "twenty million, four hundred ninety-two thousand, four hundred twenty-eight".