21273074 has 8 divisors (see below), whose sum is σ = 31933740. Its totient is φ = 10628496.

The previous prime is 21273073. The next prime is 21273097. The reversal of 21273074 is 47037212.

It can be written as a sum of positive squares in 2 ways, for example, as 20475625 + 797449 = 4525^2 + 893^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21273071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152 + ... + 6524.

Almost surely, 2^21273074 is an apocalyptic number.

21273074 is a deficient number, since it is larger than the sum of its proper divisors (10660666).

21273074 is a wasteful number, since it uses less digits than its factorization.

21273074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8044.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 21273074 is about 4612.2742763197. The cubic root of 21273074 is about 277.0831291812.

The spelling of 21273074 in words is "twenty-one million, two hundred seventy-three thousand, seventy-four".