21734554 has 4 divisors (see below), whose sum is σ = 32601834. Its totient is φ = 10867276.

The previous prime is 21734527. The next prime is 21734593. The reversal of 21734554 is 45543712.

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., 21206025 + 528529 = 4605^2 + 727^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5433637 + ... + 5433640.

Almost surely, 2^21734554 is an apocalyptic number.

21734554 is a deficient number, since it is larger than the sum of its proper divisors (10867280).

21734554 is a wasteful number, since it uses less digits than its factorization.

21734554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10867279.

The product of its digits is 16800, while the sum is 31.

The square root of 21734554 is about 4662.0332474147. The cubic root of 21734554 is about 279.0724151815.

The spelling of 21734554 in words is "twenty-one million, seven hundred thirty-four thousand, five hundred fifty-four".