20898737 has 2 divisors, whose sum is σ = 20898738. Its totient is φ = 20898736.

The previous prime is 20898677. The next prime is 20898749. The reversal of 20898737 is 73789802.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19351201 + 1547536 = 4399^2 + 1244^2 .

It is a cyclic number.

It is not a de Polignac number, because 20898737 - 2⁸ = 20898481 is a prime.

It is not a weakly prime, because it can be changed into another prime (20898767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10449368 + 10449369.

It is an arithmetic number, because the mean of its divisors is an integer number (10449369).

Almost surely, 2^20898737 is an apocalyptic number.

It is an amenable number.

20898737 is a deficient number, since it is larger than the sum of its proper divisors (1).

20898737 is an equidigital number, since it uses as much as digits as its factorization.

20898737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 20898737 is about 4571.5136442977. The cubic root of 20898737 is about 275.4482474761.

The spelling of 20898737 in words is "twenty million, eight hundred ninety-eight thousand, seven hundred thirty-seven".