20720250750 has 32 divisors (see below), whose sum is σ = 51717747744. Its totient is φ = 5525400000.

The previous prime is 20720250703. The next prime is 20720250751. The reversal of 20720250750 is 5705202702.

It is a super-2 number, since 2×20720250750² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20720250751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13812751 + ... + 13814250.

It is an arithmetic number, because the mean of its divisors is an integer number (1616179617).

Almost surely, 2^20720250750 is an apocalyptic number.

20720250750 is an abundant number, since it is smaller than the sum of its proper divisors (30997496994).

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

20720250750 is a wasteful number, since it uses less digits than its factorization.

20720250750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27627021 (or 27627011 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 30.

The spelling of 20720250750 in words is "twenty billion, seven hundred twenty million, two hundred fifty thousand, seven hundred fifty".