20424507100 has 36 divisors (see below), whose sum is σ = 44640068200. Its totient is φ = 8111021760.

The previous prime is 20424507071. The next prime is 20424507101. The reversal of 20424507100 is 170542402.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20424507101) 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, 720795 + ... + 748594.

Almost surely, 2^20424507100 is an apocalyptic number.

20424507100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20424507100 is an abundant number, since it is smaller than the sum of its proper divisors (24215561100).

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

20424507100 is a wasteful number, since it uses less digits than its factorization.

20424507100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1469542 (or 1469535 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 25.

The spelling of 20424507100 in words is "twenty billion, four hundred twenty-four million, five hundred seven thousand, one hundred".