23506621406 has 4 divisors (see below), whose sum is σ = 35259932112. Its totient is φ = 11753310702.

The previous prime is 23506621387. The next prime is 23506621409. The reversal of 23506621406 is 60412660532.

It is a happy number.

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

It is a super-2 number, since 2×23506621406² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23506621409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5876655350 + ... + 5876655353.

It is an arithmetic number, because the mean of its divisors is an integer number (8814983028).

Almost surely, 2^23506621406 is an apocalyptic number.

23506621406 is a deficient number, since it is larger than the sum of its proper divisors (11753310706).

23506621406 is a wasteful number, since it uses less digits than its factorization.

23506621406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11753310705.

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 23506621406 in words is "twenty-three billion, five hundred six million, six hundred twenty-one thousand, four hundred six".