23918740547 has 4 divisors (see below), whose sum is σ = 25758643680. Its totient is φ = 22078837416.

The previous prime is 23918740541. The next prime is 23918740579. The reversal of 23918740547 is 74504781932.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23918740547 - 2¹⁴ = 23918724163 is a prime.

It is a super-2 number, since 2×23918740547² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23918740495 and 23918740504.

It is not an unprimeable number, because it can be changed into a prime (23918740541) 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, 919951547 + ... + 919951572.

It is an arithmetic number, because the mean of its divisors is an integer number (6439660920).

Almost surely, 2^23918740547 is an apocalyptic number.

23918740547 is a deficient number, since it is larger than the sum of its proper divisors (1839903133).

23918740547 is a wasteful number, since it uses less digits than its factorization.

23918740547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1839903132.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 23918740547 in words is "twenty-three billion, nine hundred eighteen million, seven hundred forty thousand, five hundred forty-seven".