23211320420 has 24 divisors (see below), whose sum is σ = 48754777344. Its totient is φ = 9282432096.

The previous prime is 23211320383. The next prime is 23211320477. The reversal of 23211320420 is 2402311232.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 23211320392 and 23211320401.

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, 38612 + ... + 218891.

It is an arithmetic number, because the mean of its divisors is an integer number (2031449056).

Almost surely, 2^23211320420 is an apocalyptic number.

23211320420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23211320420 is an abundant number, since it is smaller than the sum of its proper divisors (25543456924).

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

23211320420 is a wasteful number, since it uses less digits than its factorization.

23211320420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262019 (or 262017 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 23211320420 its reverse (2402311232), we get a palindrome (25613631652).

The spelling of 23211320420 in words is "twenty-three billion, two hundred eleven million, three hundred twenty thousand, four hundred twenty".