20213122424 has 32 divisors (see below), whose sum is σ = 41911406640. Its totient is φ = 9061920000.

The previous prime is 20213122403. The next prime is 20213122427. The reversal of 20213122424 is 42422131202.

It is a super-2 number, since 2×20213122424² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20213122424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213122427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1566827 + ... + 1579674.

Almost surely, 2^20213122424 is an apocalyptic number.

It is an amenable number.

20213122424 is an abundant number, since it is smaller than the sum of its proper divisors (21698284216).

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

20213122424 is a wasteful number, since it uses less digits than its factorization.

20213122424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3146591 (or 3146587 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 20213122424 its reverse (42422131202), we get a palindrome (62635253626).

The spelling of 20213122424 in words is "twenty billion, two hundred thirteen million, one hundred twenty-two thousand, four hundred twenty-four".