20276031493 has 2 divisors, whose sum is σ = 20276031494. Its totient is φ = 20276031492.

The previous prime is 20276031467. The next prime is 20276031497. The reversal of 20276031493 is 39413067202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17603451684 + 2672579809 = 132678^2 + 51697^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20276031493 is a prime.

It is a super-2 number, since 2×20276031493² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20276031497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10138015746 + 10138015747.

It is an arithmetic number, because the mean of its divisors is an integer number (10138015747).

Almost surely, 2^20276031493 is an apocalyptic number.

It is an amenable number.

20276031493 is a deficient number, since it is larger than the sum of its proper divisors (1).

20276031493 is an equidigital number, since it uses as much as digits as its factorization.

20276031493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 37.

Adding to 20276031493 its reverse (39413067202), we get a palindrome (59689098695).

The spelling of 20276031493 in words is "twenty billion, two hundred seventy-six million, thirty-one thousand, four hundred ninety-three".