23059961820 has 96 divisors (see below), whose sum is σ = 81990988800. Its totient is φ = 5270847552.

The previous prime is 23059961791. The next prime is 23059961891. The reversal of 23059961820 is 2816995032.

23059961820 is a `hidden beast` number, since 2 + 3 + 0 + 5 + 9 + 9 + 618 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3046480 + ... + 3054039.

It is an arithmetic number, because the mean of its divisors is an integer number (854072800).

Almost surely, 2^23059961820 is an apocalyptic number.

23059961820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23059961820 is an abundant number, since it is smaller than the sum of its proper divisors (58931026980).

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

23059961820 is a wasteful number, since it uses less digits than its factorization.

23059961820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6100544 (or 6100536 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 23059961820 in words is "twenty-three billion, fifty-nine million, nine hundred sixty-one thousand, eight hundred twenty".