21860340623 has 8 divisors (see below), whose sum is σ = 23849420880. Its totient is φ = 19871556480.

The previous prime is 21860340611. The next prime is 21860340661. The reversal of 21860340623 is 32604306812.

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

It is a cyclic number.

It is not a de Polignac number, because 21860340623 - 2¹² = 21860336527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21860340673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97661 + ... + 230777.

It is an arithmetic number, because the mean of its divisors is an integer number (2981177610).

Almost surely, 2^21860340623 is an apocalyptic number.

21860340623 is a deficient number, since it is larger than the sum of its proper divisors (1989080257).

21860340623 is a wasteful number, since it uses less digits than its factorization.

21860340623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148057.

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 21860340623 in words is "twenty-one billion, eight hundred sixty million, three hundred forty thousand, six hundred twenty-three".