20432812949 has 2 divisors, whose sum is σ = 20432812950. Its totient is φ = 20432812948.

The previous prime is 20432812937. The next prime is 20432812951. The reversal of 20432812949 is 94921823402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19831680625 + 601132324 = 140825^2 + 24518^2 .

It is a cyclic number.

It is not a de Polignac number, because 20432812949 - 2⁸ = 20432812693 is a prime.

Together with 20432812951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20432812909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10216406474 + 10216406475.

It is an arithmetic number, because the mean of its divisors is an integer number (10216406475).

Almost surely, 2^20432812949 is an apocalyptic number.

It is an amenable number.

20432812949 is a deficient number, since it is larger than the sum of its proper divisors (1).

20432812949 is an equidigital number, since it uses as much as digits as its factorization.

20432812949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 20432812949 in words is "twenty billion, four hundred thirty-two million, eight hundred twelve thousand, nine hundred forty-nine".