20573433720 has 192 divisors, whose sum is σ = 76664240640. Its totient is φ = 4687200000.

The previous prime is 20573433701. The next prime is 20573433731. The reversal of 20573433720 is 2733437502.

20573433720 is a `hidden beast` number, since 20 + 573 + 43 + 3 + 7 + 20 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 770595 + ... + 796845.

It is an arithmetic number, because the mean of its divisors is an integer number (399292920).

Almost surely, 2^20573433720 is an apocalyptic number.

20573433720 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 20573433720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38332120320).

20573433720 is an abundant number, since it is smaller than the sum of its proper divisors (56090806920).

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

20573433720 is a wasteful number, since it uses less digits than its factorization.

20573433720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26586 (or 26579 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 36.

The spelling of 20573433720 in words is "twenty billion, five hundred seventy-three million, four hundred thirty-three thousand, seven hundred twenty".