20672513472 has 112 divisors (see below), whose sum is σ = 60015180960. Its totient is φ = 6240718848.

The previous prime is 20672513471. The next prime is 20672513489. The reversal of 20672513472 is 27431527602.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 20672513472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20672513471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54154 + ... + 210422.

It is an arithmetic number, because the mean of its divisors is an integer number (535849830).

Almost surely, 2^20672513472 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 20672513472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30007590480).

20672513472 is an abundant number, since it is smaller than the sum of its proper divisors (39342667488).

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

20672513472 is a wasteful number, since it uses less digits than its factorization.

20672513472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156350 (or 156340 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 39.

The spelling of 20672513472 in words is "twenty billion, six hundred seventy-two million, five hundred thirteen thousand, four hundred seventy-two".