21236307154 has 8 divisors (see below), whose sum is σ = 32146703820. Its totient is φ = 10520739216.

The previous prime is 21236307133. The next prime is 21236307179. The reversal of 21236307154 is 45170363212.

It can be written as a sum of positive squares in 2 ways, for example, as 21002675929 + 233631225 = 144923^2 + 15285^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48706909 + ... + 48707344.

Almost surely, 2^21236307154 is an apocalyptic number.

21236307154 is a deficient number, since it is larger than the sum of its proper divisors (10910396666).

21236307154 is a wasteful number, since it uses less digits than its factorization.

21236307154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97414364.

The product of its (nonzero) digits is 30240, while the sum is 34.

The spelling of 21236307154 in words is "twenty-one billion, two hundred thirty-six million, three hundred seven thousand, one hundred fifty-four".