20722049413 has 6 divisors (see below), whose sum is σ = 22438669074. Its totient is φ = 19128045456.

The previous prime is 20722049407. The next prime is 20722049419. The reversal of 20722049413 is 31494022702.

It is an interprime number because it is at equal distance from previous prime (20722049407) and next prime (20722049419).

It can be written as a sum of positive squares in 3 ways, for example, as 507465729 + 20214583684 = 22527^2 + 142178^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20722049413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20722049419) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 61307670 + ... + 61308007.

It is an arithmetic number, because the mean of its divisors is an integer number (3739778179).

Almost surely, 2^20722049413 is an apocalyptic number.

It is an amenable number.

20722049413 is a deficient number, since it is larger than the sum of its proper divisors (1716619661).

20722049413 is a wasteful number, since it uses less digits than its factorization.

20722049413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122615703 (or 122615690 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The spelling of 20722049413 in words is "twenty billion, seven hundred twenty-two million, forty-nine thousand, four hundred thirteen".