20761501 has 2 divisors, whose sum is σ = 20761502. Its totient is φ = 20761500.

The previous prime is 20761493. The next prime is 20761513. The reversal of 20761501 is 10516702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18481401 + 2280100 = 4299^2 + 1510^2 .

It is a cyclic number.

It is not a de Polignac number, because 20761501 - 2³ = 20761493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20761541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10380750 + 10380751.

It is an arithmetic number, because the mean of its divisors is an integer number (10380751).

Almost surely, 2^20761501 is an apocalyptic number.

It is an amenable number.

20761501 is a deficient number, since it is larger than the sum of its proper divisors (1).

20761501 is an equidigital number, since it uses as much as digits as its factorization.

20761501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 20761501 is about 4556.4790134489. The cubic root of 20761501 is about 274.8439930570.

The spelling of 20761501 in words is "twenty million, seven hundred sixty-one thousand, five hundred one".