20372185040 has 80 divisors (see below), whose sum is σ = 48195367680. Its totient is φ = 8007068160.

The previous prime is 20372185039. The next prime is 20372185051. The reversal of 20372185040 is 4058127302.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 20372184988 and 20372185006.

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, 1325882 + ... + 1341158.

It is an arithmetic number, because the mean of its divisors is an integer number (602442096).

Almost surely, 2^20372185040 is an apocalyptic number.

20372185040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20372185040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24097683840).

20372185040 is an abundant number, since it is smaller than the sum of its proper divisors (27823182640).

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

20372185040 is a wasteful number, since it uses less digits than its factorization.

20372185040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15580 (or 15574 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The spelling of 20372185040 in words is "twenty billion, three hundred seventy-two million, one hundred eighty-five thousand, forty".