20274813 has 32 divisors (see below), whose sum is σ = 33062400. Its totient is φ = 12201408.

The previous prime is 20274811. The next prime is 20274827. The reversal of 20274813 is 31847202.

It is not a de Polignac number, because 20274813 - 2¹ = 20274811 is a prime.

It is a super-2 number, since 2×20274813² = 822136084369938, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20274811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15883 + ... + 17111.

It is an arithmetic number, because the mean of its divisors is an integer number (1033200).

Almost surely, 2^20274813 is an apocalyptic number.

It is an amenable number.

20274813 is a deficient number, since it is larger than the sum of its proper divisors (12787587).

20274813 is a wasteful number, since it uses less digits than its factorization.

20274813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298 (or 1292 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 20274813 is about 4502.7561559560. The cubic root of 20274813 is about 272.6793724057.

The spelling of 20274813 in words is "twenty million, two hundred seventy-four thousand, eight hundred thirteen".