20431343100 has 72 divisors (see below), whose sum is σ = 67559648128. Its totient is φ = 4670020800.

The previous prime is 20431343083. The next prime is 20431343129. The reversal of 20431343100 is 134313402.

It is a super-2 number, since 2×20431343100² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4862506 + ... + 4866705.

Almost surely, 2^20431343100 is an apocalyptic number.

20431343100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20431343100 is an abundant number, since it is smaller than the sum of its proper divisors (47128305028).

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

20431343100 is a wasteful number, since it uses less digits than its factorization.

20431343100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9729235 (or 9729228 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20431343100 its reverse (134313402), we get a palindrome (20565656502).

The spelling of 20431343100 in words is "twenty billion, four hundred thirty-one million, three hundred forty-three thousand, one hundred".