20274553 has 4 divisors (see below), whose sum is σ = 21834148. Its totient is φ = 18714960.

The previous prime is 20274533. The next prime is 20274559. The reversal of 20274553 is 35547202.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9072144 + 11202409 = 3012^2 + 3347^2 .

It is a cyclic number.

It is not a de Polignac number, because 20274553 - 2⁵ = 20274521 is a prime.

It is a super-2 number, since 2×20274553² = 822114998699618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20274559) 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, 779778 + ... + 779803.

It is an arithmetic number, because the mean of its divisors is an integer number (5458537).

Almost surely, 2^20274553 is an apocalyptic number.

It is an amenable number.

20274553 is a deficient number, since it is larger than the sum of its proper divisors (1559595).

20274553 is a wasteful number, since it uses less digits than its factorization.

20274553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559594.

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 20274553 is about 4502.7272846576. The cubic root of 20274553 is about 272.6782068062.

The spelling of 20274553 in words is "twenty million, two hundred seventy-four thousand, five hundred fifty-three".