20431213007 has 8 divisors (see below), whose sum is σ = 21334174080. Its totient is φ = 19529472600.

The previous prime is 20431212979. The next prime is 20431213009. The reversal of 20431213007 is 70031213402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20431213007 - 2³² = 16136245711 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431213009) 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, 270869 + ... + 337982.

It is an arithmetic number, because the mean of its divisors is an integer number (2666771760).

Almost surely, 2^20431213007 is an apocalyptic number.

20431213007 is a deficient number, since it is larger than the sum of its proper divisors (902961073).

20431213007 is a wasteful number, since it uses less digits than its factorization.

20431213007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610333.

The product of its (nonzero) digits is 1008, while the sum is 23.

Adding to 20431213007 its reverse (70031213402), we get a palindrome (90462426409).

The spelling of 20431213007 in words is "twenty billion, four hundred thirty-one million, two hundred thirteen thousand, seven".