20672748 has 54 divisors (see below), whose sum is σ = 55538756. Its totient is φ = 6482304.

The previous prime is 20672747. The next prime is 20672767. The reversal of 20672748 is 84727602.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20672747) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9411 + ... + 11397.

Almost surely, 2^20672748 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20672748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27769378).

20672748 is an abundant number, since it is smaller than the sum of its proper divisors (34866008).

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

20672748 is a wasteful number, since it uses less digits than its factorization.

20672748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2031 (or 2009 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 20672748 is about 4546.7293739566. The cubic root of 20672748 is about 274.4517916276.

The spelling of 20672748 in words is "twenty million, six hundred seventy-two thousand, seven hundred forty-eight".