20746164 has 48 divisors (see below), whose sum is σ = 50097600. Its totient is φ = 6677760.

The previous prime is 20746147. The next prime is 20746177. The reversal of 20746164 is 46164702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73167 + ... + 73449.

It is an arithmetic number, because the mean of its divisors is an integer number (1043700).

Almost surely, 2^20746164 is an apocalyptic number.

It is an amenable number.

20746164 is an abundant number, since it is smaller than the sum of its proper divisors (29351436).

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

20746164 is a wasteful number, since it uses less digits than its factorization.

20746164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480 (or 478 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 20746164 is about 4554.7957144092. The cubic root of 20746164 is about 274.7762985179.

It can be divided in two parts, 20746 and 164, that added together give a triangular number (20910 = T₂₀₄).

The spelling of 20746164 in words is "twenty million, seven hundred forty-six thousand, one hundred sixty-four".