20125223520 has 96 divisors (see below), whose sum is σ = 65107875168. Its totient is φ = 5221675008.

The previous prime is 20125223513. The next prime is 20125223549. The reversal of 20125223520 is 2532252102.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×20125223520² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 548829 + ... + 584348.

It is an arithmetic number, because the mean of its divisors is an integer number (678207033).

Almost surely, 2^20125223520 is an apocalyptic number.

20125223520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20125223520 is an abundant number, since it is smaller than the sum of its proper divisors (44982651648).

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

20125223520 is a wasteful number, since it uses less digits than its factorization.

20125223520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133232 (or 1133224 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

Adding to 20125223520 its reverse (2532252102), we get a palindrome (22657475622).

The spelling of 20125223520 in words is "twenty billion, one hundred twenty-five million, two hundred twenty-three thousand, five hundred twenty".