20150761 has 2 divisors, whose sum is σ = 20150762. Its totient is φ = 20150760.

The previous prime is 20150749. The next prime is 20150821. The reversal of 20150761 is 16705102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11560000 + 8590761 = 3400^2 + 2931^2 .

It is a cyclic number.

It is not a de Polignac number, because 20150761 - 2⁷ = 20150633 is a prime.

It is not a weakly prime, because it can be changed into another prime (20150161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10075380 + 10075381.

It is an arithmetic number, because the mean of its divisors is an integer number (10075381).

Almost surely, 2^20150761 is an apocalyptic number.

It is an amenable number.

20150761 is a deficient number, since it is larger than the sum of its proper divisors (1).

20150761 is an equidigital number, since it uses as much as digits as its factorization.

20150761 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 20150761 is about 4488.9599018035. The cubic root of 20150761 is about 272.1221022224.

Adding to 20150761 its reverse (16705102), we get a palindrome (36855863).

The spelling of 20150761 in words is "twenty million, one hundred fifty thousand, seven hundred sixty-one".