21846542315 has 8 divisors (see below), whose sum is σ = 28232454768. Its totient is φ = 16132831200.

The previous prime is 21846542297. The next prime is 21846542317. The reversal of 21846542315 is 51324564812.

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

It is not a de Polignac number, because 21846542315 - 2⁶ = 21846542251 is a prime.

It is a super-2 number, since 2×21846542315² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21846542317) 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, 168050261 + ... + 168050390.

It is an arithmetic number, because the mean of its divisors is an integer number (3529056846).

Almost surely, 2^21846542315 is an apocalyptic number.

21846542315 is a deficient number, since it is larger than the sum of its proper divisors (6385912453).

21846542315 is a wasteful number, since it uses less digits than its factorization.

21846542315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336100669.

The product of its digits is 230400, while the sum is 41.

The spelling of 21846542315 in words is "twenty-one billion, eight hundred forty-six million, five hundred forty-two thousand, three hundred fifteen".