21324266354 has 4 divisors (see below), whose sum is σ = 31986399534. Its totient is φ = 10662133176.

The previous prime is 21324266321. The next prime is 21324266377. The reversal of 21324266354 is 45366242312.

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

It can be written as a sum of positive squares in only one way, i.e., 21076361329 + 247905025 = 145177^2 + 15745^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5331066587 + ... + 5331066590.

Almost surely, 2^21324266354 is an apocalyptic number.

21324266354 is a deficient number, since it is larger than the sum of its proper divisors (10662133180).

21324266354 is a wasteful number, since it uses less digits than its factorization.

21324266354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10662133179.

The product of its digits is 207360, while the sum is 38.

The spelling of 21324266354 in words is "twenty-one billion, three hundred twenty-four million, two hundred sixty-six thousand, three hundred fifty-four".