9020021761 has 2 divisors, whose sum is σ = 9020021762. Its totient is φ = 9020021760.

The previous prime is 9020021741. The next prime is 9020021827. The reversal of 9020021761 is 1671200209.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8979457600 + 40564161 = 94760^2 + 6369^2 .

It is a cyclic number.

It is not a de Polignac number, because 9020021761 - 2¹¹ = 9020019713 is a prime.

It is a super-2 number, since 2×9020021761² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9020021741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4510010880 + 4510010881.

It is an arithmetic number, because the mean of its divisors is an integer number (4510010881).

Almost surely, 2^9020021761 is an apocalyptic number.

It is an amenable number.

9020021761 is a deficient number, since it is larger than the sum of its proper divisors (1).

9020021761 is an equidigital number, since it uses as much as digits as its factorization.

9020021761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 9020021761 is about 94973.7951279194. The cubic root of 9020021761 is about 2081.6251599454.

The spelling of 9020021761 in words is "nine billion, twenty million, twenty-one thousand, seven hundred sixty-one".