20273651 has 2 divisors, whose sum is σ = 20273652. Its totient is φ = 20273650.

The previous prime is 20273647. The next prime is 20273681. The reversal of 20273651 is 15637202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20273651 - 2² = 20273647 is a prime.

It is a super-2 number, since 2×20273651² = 822041849739602, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20273651.

It is not a weakly prime, because it can be changed into another prime (20273641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10136825 + 10136826.

It is an arithmetic number, because the mean of its divisors is an integer number (10136826).

Almost surely, 2^20273651 is an apocalyptic number.

20273651 is a deficient number, since it is larger than the sum of its proper divisors (1).

20273651 is an equidigital number, since it uses as much as digits as its factorization.

20273651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 20273651 is about 4502.6271220255. The cubic root of 20273651 is about 272.6741629950.

The spelling of 20273651 in words is "twenty million, two hundred seventy-three thousand, six hundred fifty-one".