20737672 has 8 divisors (see below), whose sum is σ = 38883150. Its totient is φ = 10368832.

The previous prime is 20737663. The next prime is 20737679. The reversal of 20737672 is 27673702.

It can be written as a sum of positive squares in only one way, i.e., 17255716 + 3481956 = 4154^2 + 1866^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20737679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1296097 + ... + 1296112.

Almost surely, 2^20737672 is an apocalyptic number.

It is an amenable number.

20737672 is a deficient number, since it is larger than the sum of its proper divisors (18145478).

20737672 is a wasteful number, since it uses less digits than its factorization.

20737672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2592215 (or 2592211 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 34.

The square root of 20737672 is about 4553.8634147282. The cubic root of 20737672 is about 274.7388021278.

The spelling of 20737672 in words is "twenty million, seven hundred thirty-seven thousand, six hundred seventy-two".