20274691 has 6 divisors (see below), whose sum is σ = 21362460. Its totient is φ = 19189008.

The previous prime is 20274677. The next prime is 20274697. The reversal of 20274691 is 19647202.

It is not a de Polignac number, because 20274691 - 2⁹ = 20274179 is a prime.

It is a super-2 number, since 2×20274691² = 822126190290962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20274697) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19111 + ... + 20143.

It is an arithmetic number, because the mean of its divisors is an integer number (3560410).

Almost surely, 2^20274691 is an apocalyptic number.

20274691 is a deficient number, since it is larger than the sum of its proper divisors (1087769).

20274691 is an frugal number, since it uses more digits than its factorization.

20274691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2085 (or 1052 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 20274691 is about 4502.7426086775. The cubic root of 20274691 is about 272.6788254718.

The spelling of 20274691 in words is "twenty million, two hundred seventy-four thousand, six hundred ninety-one".