20420212304 has 40 divisors (see below), whose sum is σ = 42233100480. Its totient is φ = 9536486400.

The previous prime is 20420212297. The next prime is 20420212321. The reversal of 20420212304 is 40321202402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 451457 + ... + 494624.

It is an arithmetic number, because the mean of its divisors is an integer number (1055827512).

Almost surely, 2^20420212304 is an apocalyptic number.

It is an amenable number.

20420212304 is an abundant number, since it is smaller than the sum of its proper divisors (21812888176).

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

20420212304 is a wasteful number, since it uses less digits than its factorization.

20420212304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946179 (or 946173 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 20420212304 its reverse (40321202402), we get a palindrome (60741414706).

The spelling of 20420212304 in words is "twenty billion, four hundred twenty million, two hundred twelve thousand, three hundred four".