23721542 has 8 divisors (see below), whose sum is σ = 38319456. Its totient is φ = 10948392.

The previous prime is 23721539. The next prime is 23721547. The reversal of 23721542 is 24512732.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 912367 = 23721542 / (2 + 3 + 7 + 2 + 1 + 5 + 4 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23721547) 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, 456158 + ... + 456209.

It is an arithmetic number, because the mean of its divisors is an integer number (4789932).

Almost surely, 2^23721542 is an apocalyptic number.

23721542 is a deficient number, since it is larger than the sum of its proper divisors (14597914).

23721542 is a wasteful number, since it uses less digits than its factorization.

23721542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912382.

The product of its digits is 3360, while the sum is 26.

The square root of 23721542 is about 4870.4765680578. The cubic root of 23721542 is about 287.3299995606.

The spelling of 23721542 in words is "twenty-three million, seven hundred twenty-one thousand, five hundred forty-two".