20442902 has 8 divisors (see below), whose sum is σ = 30707856. Its totient is φ = 10206952.

The previous prime is 20442901. The next prime is 20442923. The reversal of 20442902 is 20924402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20442901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5393 + ... + 8364.

It is an arithmetic number, because the mean of its divisors is an integer number (3838482).

Almost surely, 2^20442902 is an apocalyptic number.

20442902 is a deficient number, since it is larger than the sum of its proper divisors (10264954).

20442902 is a wasteful number, since it uses less digits than its factorization.

20442902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14502.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20442902 is about 4521.3827530967. The cubic root of 20442902 is about 273.4308519113.

The spelling of 20442902 in words is "twenty million, four hundred forty-two thousand, nine hundred two".