23120511220 has 12 divisors (see below), whose sum is σ = 48553073604. Its totient is φ = 9248204480.

The previous prime is 23120511217. The next prime is 23120511223. The reversal of 23120511220 is 2211502132.

It is an interprime number because it is at equal distance from previous prime (23120511217) and next prime (23120511223).

It can be written as a sum of positive squares in 2 ways, for example, as 17505406864 + 5615104356 = 132308^2 + 74934^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23120511223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578012761 + ... + 578012800.

It is an arithmetic number, because the mean of its divisors is an integer number (4046089467).

Almost surely, 2^23120511220 is an apocalyptic number.

23120511220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23120511220 is an abundant number, since it is smaller than the sum of its proper divisors (25432562384).

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

23120511220 is a wasteful number, since it uses less digits than its factorization.

23120511220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156025570 (or 1156025568 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The spelling of 23120511220 in words is "twenty-three billion, one hundred twenty million, five hundred eleven thousand, two hundred twenty".