20994132827 has 2 divisors, whose sum is σ = 20994132828. Its totient is φ = 20994132826.

The previous prime is 20994132811. The next prime is 20994132869. The reversal of 20994132827 is 72823149902.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20994132827 - 2⁴ = 20994132811 is a prime.

It is a super-2 number, since 2×20994132827² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20994132127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10497066413 + 10497066414.

It is an arithmetic number, because the mean of its divisors is an integer number (10497066414).

Almost surely, 2^20994132827 is an apocalyptic number.

20994132827 is a deficient number, since it is larger than the sum of its proper divisors (1).

20994132827 is an equidigital number, since it uses as much as digits as its factorization.

20994132827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 20994132827 in words is "twenty billion, nine hundred ninety-four million, one hundred thirty-two thousand, eight hundred twenty-seven".