20402044 has 12 divisors (see below), whose sum is σ = 38450104. Its totient is φ = 9416304.

The previous prime is 20402021. The next prime is 20402087. The reversal of 20402044 is 44020402.

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, 196122 + ... + 196225.

Almost surely, 2^20402044 is an apocalyptic number.

It is an amenable number.

20402044 is a deficient number, since it is larger than the sum of its proper divisors (18048060).

20402044 is a wasteful number, since it uses less digits than its factorization.

20402044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392364 (or 392362 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 20402044 is about 4516.8621851901. The cubic root of 20402044 is about 273.2485671448.

Adding to 20402044 its reverse (44020402), we get a palindrome (64422446).

The spelling of 20402044 in words is "twenty million, four hundred two thousand, forty-four".