23387549651 has 4 divisors (see below), whose sum is σ = 23403940392. Its totient is φ = 23371158912.

The previous prime is 23387549611. The next prime is 23387549677. The reversal of 23387549651 is 15694578332.

It is a happy number.

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 23387549651 - 2¹⁸ = 23387287507 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23387549593 and 23387549602.

It is not an unprimeable number, because it can be changed into a prime (23387549611) 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, 8193230 + ... + 8196083.

It is an arithmetic number, because the mean of its divisors is an integer number (5850985098).

Almost surely, 2^23387549651 is an apocalyptic number.

23387549651 is a deficient number, since it is larger than the sum of its proper divisors (16390741).

23387549651 is a wasteful number, since it uses less digits than its factorization.

23387549651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16390740.

The product of its digits is 5443200, while the sum is 53.

The spelling of 23387549651 in words is "twenty-three billion, three hundred eighty-seven million, five hundred forty-nine thousand, six hundred fifty-one".