20672633 has 2 divisors, whose sum is σ = 20672634. Its totient is φ = 20672632.

The previous prime is 20672609. The next prime is 20672657. The reversal of 20672633 is 33627602.

It is a balanced prime because it is at equal distance from previous prime (20672609) and next prime (20672657).

It can be written as a sum of positive squares in only one way, i.e., 10705984 + 9966649 = 3272^2 + 3157^2 .

It is a cyclic number.

It is not a de Polignac number, because 20672633 - 2²⁰ = 19624057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20672596 and 20672605.

It is not a weakly prime, because it can be changed into another prime (20672683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10336316 + 10336317.

It is an arithmetic number, because the mean of its divisors is an integer number (10336317).

Almost surely, 2^20672633 is an apocalyptic number.

It is an amenable number.

20672633 is a deficient number, since it is larger than the sum of its proper divisors (1).

20672633 is an equidigital number, since it uses as much as digits as its factorization.

20672633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 29.

The square root of 20672633 is about 4546.7167274859. The cubic root of 20672633 is about 274.4512827126.

The spelling of 20672633 in words is "twenty million, six hundred seventy-two thousand, six hundred thirty-three".