20072651 has 2 divisors, whose sum is σ = 20072652. Its totient is φ = 20072650.

The previous prime is 20072627. The next prime is 20072681. The reversal of 20072651 is 15627002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20072651 - 2¹⁸ = 19810507 is a prime.

It is a super-2 number, since 2×20072651² = 805822636335602, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20072621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10036325 + 10036326.

It is an arithmetic number, because the mean of its divisors is an integer number (10036326).

Almost surely, 2^20072651 is an apocalyptic number.

20072651 is a deficient number, since it is larger than the sum of its proper divisors (1).

20072651 is an equidigital number, since it uses as much as digits as its factorization.

20072651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20072651 is about 4480.2512206348. The cubic root of 20072651 is about 271.7700397414.

Adding to 20072651 its reverse (15627002), we get a palindrome (35699653).

The spelling of 20072651 in words is "twenty million, seventy-two thousand, six hundred fifty-one".