20672574 has 32 divisors (see below), whose sum is σ = 45480960. Its totient is φ = 6224352.

The previous prime is 20672549. The next prime is 20672593. The reversal of 20672574 is 47527602.

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, 847 + ... + 6485.

It is an arithmetic number, because the mean of its divisors is an integer number (1421280).

Almost surely, 2^20672574 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20672574, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22740480).

20672574 is an abundant number, since it is smaller than the sum of its proper divisors (24808386).

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

20672574 is a wasteful number, since it uses less digits than its factorization.

20672574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5704.

The product of its (nonzero) digits is 23520, while the sum is 33.

The square root of 20672574 is about 4546.7102392829. The cubic root of 20672574 is about 274.4510216163.

The spelling of 20672574 in words is "twenty million, six hundred seventy-two thousand, five hundred seventy-four".