20404892 has 6 divisors (see below), whose sum is σ = 35708568. Its totient is φ = 10202444.

The previous prime is 20404889. The next prime is 20404907. The reversal of 20404892 is 29840402.

It is a super-4 number, since 4×20404892⁴ (a number of 30 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2550608 + ... + 2550615.

It is an arithmetic number, because the mean of its divisors is an integer number (5951428).

Almost surely, 2^20404892 is an apocalyptic number.

It is an amenable number.

20404892 is a deficient number, since it is larger than the sum of its proper divisors (15303676).

20404892 is a wasteful number, since it uses less digits than its factorization.

20404892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5101227 (or 5101225 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 20404892 is about 4517.1774372942. The cubic root of 20404892 is about 273.2612811603.

The spelling of 20404892 in words is "twenty million, four hundred four thousand, eight hundred ninety-two".