20146869637 has 2 divisors, whose sum is σ = 20146869638. Its totient is φ = 20146869636.

The previous prime is 20146869577. The next prime is 20146869671. The reversal of 20146869637 is 73696864102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18907900036 + 1238969601 = 137506^2 + 35199^2 .

It is a cyclic number.

It is not a de Polignac number, because 20146869637 - 2¹⁵ = 20146836869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20146869037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10073434818 + 10073434819.

It is an arithmetic number, because the mean of its divisors is an integer number (10073434819).

Almost surely, 2^20146869637 is an apocalyptic number.

It is an amenable number.

20146869637 is a deficient number, since it is larger than the sum of its proper divisors (1).

20146869637 is an equidigital number, since it uses as much as digits as its factorization.

20146869637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 20146869637 in words is "twenty billion, one hundred forty-six million, eight hundred sixty-nine thousand, six hundred thirty-seven".