20531422104 has 96 divisors (see below), whose sum is σ = 54974045520. Its totient is φ = 6367854592.

The previous prime is 20531422091. The next prime is 20531422141. The reversal of 20531422104 is 40122413502.

It is a super-2 number, since 2×20531422104² (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 23 ways as a sum of consecutive naturals, for example, 3228592 + ... + 3234944.

Almost surely, 2^20531422104 is an apocalyptic number.

20531422104 is a gapful number since it is divisible by the number (24) 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 20531422104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27487022760).

20531422104 is an abundant number, since it is smaller than the sum of its proper divisors (34442623416).

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

20531422104 is a wasteful number, since it uses less digits than its factorization.

20531422104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6557 (or 6464 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 20531422104 its reverse (40122413502), we get a palindrome (60653835606).

The spelling of 20531422104 in words is "twenty billion, five hundred thirty-one million, four hundred twenty-two thousand, one hundred four".