20274530 has 16 divisors (see below), whose sum is σ = 36634680. Its totient is φ = 8078592.

The previous prime is 20274521. The next prime is 20274533. The reversal of 20274530 is 3547202.

It can be written as a sum of positive squares in 4 ways, for example, as 10621081 + 9653449 = 3259^2 + 3107^2 .

It is a super-2 number, since 2×20274530² = 822113133441800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20274496 and 20274505.

It is not an unprimeable number, because it can be changed into a prime (20274533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1079 + ... + 6458.

Almost surely, 2^20274530 is an apocalyptic number.

20274530 is a deficient number, since it is larger than the sum of its proper divisors (16360150).

20274530 is a wasteful number, since it uses less digits than its factorization.

20274530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7813.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 20274530 is about 4502.7247306492. The cubic root of 20274530 is about 272.6781036949.

The spelling of 20274530 in words is "twenty million, two hundred seventy-four thousand, five hundred thirty".