23423821740 has 72 divisors (see below), whose sum is σ = 77511562128. Its totient is φ = 5678501760.

The previous prime is 23423821633. The next prime is 23423821747. The reversal of 23423821740 is 4712832432.

It is a happy number.

23423821740 is a `hidden beast` number, since 234 + 2 + 382 + 1 + 7 + 40 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 23423821695 and 23423821704.

It is not an unprimeable number, because it can be changed into a prime (23423821747) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5913127 + ... + 5917086.

It is an arithmetic number, because the mean of its divisors is an integer number (1076549474).

Almost surely, 2^23423821740 is an apocalyptic number.

23423821740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23423821740 is an abundant number, since it is smaller than the sum of its proper divisors (54087740388).

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

23423821740 is a wasteful number, since it uses less digits than its factorization.

23423821740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11830239 (or 11830234 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The spelling of 23423821740 in words is "twenty-three billion, four hundred twenty-three million, eight hundred twenty-one thousand, seven hundred forty".