2142020957 has 2 divisors, whose sum is σ = 2142020958. Its totient is φ = 2142020956.

The previous prime is 2142020953. The next prime is 2142020999. The reversal of 2142020957 is 7590202412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2141283076 + 737881 = 46274^2 + 859^2 .

It is a cyclic number.

It is not a de Polignac number, because 2142020957 - 2² = 2142020953 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2142020953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071010478 + 1071010479.

It is an arithmetic number, because the mean of its divisors is an integer number (1071010479).

Almost surely, 2^2142020957 is an apocalyptic number.

It is an amenable number.

2142020957 is a deficient number, since it is larger than the sum of its proper divisors (1).

2142020957 is an equidigital number, since it uses as much as digits as its factorization.

2142020957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 2142020957 is about 46281.9722678280. The cubic root of 2142020957 is about 1289.0642728410.

The spelling of 2142020957 in words is "two billion, one hundred forty-two million, twenty thousand, nine hundred fifty-seven".