20872433 has 2 divisors, whose sum is σ = 20872434. Its totient is φ = 20872432.

The previous prime is 20872429. The next prime is 20872457. The reversal of 20872433 is 33427802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11336689 + 9535744 = 3367^2 + 3088^2 .

It is a cyclic number.

It is not a de Polignac number, because 20872433 - 2² = 20872429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20872396 and 20872405.

It is not a weakly prime, because it can be changed into another prime (20872483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10436216 + 10436217.

It is an arithmetic number, because the mean of its divisors is an integer number (10436217).

Almost surely, 2^20872433 is an apocalyptic number.

It is an amenable number.

20872433 is a deficient number, since it is larger than the sum of its proper divisors (1).

20872433 is an equidigital number, since it uses as much as digits as its factorization.

20872433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 20872433 is about 4568.6357920062. The cubic root of 20872433 is about 275.3326355038.

The spelling of 20872433 in words is "twenty million, eight hundred seventy-two thousand, four hundred thirty-three".