20404746 has 24 divisors (see below), whose sum is σ = 46537920. Its totient is φ = 6443496.

The previous prime is 20404739. The next prime is 20404753. The reversal of 20404746 is 64740402.

It is an interprime number because it is at equal distance from previous prime (20404739) and next prime (20404753).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29490 + ... + 30173.

It is an arithmetic number, because the mean of its divisors is an integer number (1939080).

Almost surely, 2^20404746 is an apocalyptic number.

20404746 is an abundant number, since it is smaller than the sum of its proper divisors (26133174).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20404746 is a wasteful number, since it uses less digits than its factorization.

20404746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59690 (or 59687 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 20404746 is about 4517.1612767312. The cubic root of 20404746 is about 273.2606294173.

It can be divided in two parts, 2040 and 4746, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 20404746 in words is "twenty million, four hundred four thousand, seven hundred forty-six".