23409543620 has 24 divisors (see below), whose sum is σ = 49712405400. Its totient is φ = 9258605312.

The previous prime is 23409543611. The next prime is 23409543629. The reversal of 23409543620 is 2634590432.

It is an interprime number because it is at equal distance from previous prime (23409543611) and next prime (23409543629).

It can be written as a sum of positive squares in 4 ways, for example, as 1320450244 + 22089093376 = 36338^2 + 148624^2 .

It is not an unprimeable number, because it can be changed into a prime (23409543629) 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, 6573935 + ... + 6577494.

It is an arithmetic number, because the mean of its divisors is an integer number (2071350225).

Almost surely, 2^23409543620 is an apocalyptic number.

23409543620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23409543620 is an abundant number, since it is smaller than the sum of its proper divisors (26302861780).

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

23409543620 is a wasteful number, since it uses less digits than its factorization.

23409543620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13151527 (or 13151525 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 38.

The spelling of 23409543620 in words is "twenty-three billion, four hundred nine million, five hundred forty-three thousand, six hundred twenty".