20202131124 has 36 divisors (see below), whose sum is σ = 58361712864. Its totient is φ = 5772037392.

The previous prime is 20202131123. The next prime is 20202131137. The reversal of 20202131124 is 42113120202.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×20202131124² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20202131097 and 20202131106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202131123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40083342 + ... + 40083845.

Almost surely, 2^20202131124 is an apocalyptic number.

It is an amenable number.

20202131124 is an abundant number, since it is smaller than the sum of its proper divisors (38159581740).

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

20202131124 is a wasteful number, since it uses less digits than its factorization.

20202131124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80167204 (or 80167199 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20202131124 its reverse (42113120202), we get a palindrome (62315251326).

The spelling of 20202131124 in words is "twenty billion, two hundred two million, one hundred thirty-one thousand, one hundred twenty-four".