20507397413 has 4 divisors (see below), whose sum is σ = 20854980480. Its totient is φ = 20159814348.

The previous prime is 20507397359. The next prime is 20507397451. The reversal of 20507397413 is 31479370502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31479370502 = 2 ⋅15739685251.

It is a cyclic number.

It is not a de Polignac number, because 20507397413 - 2¹⁶ = 20507331877 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 (20507391413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173791445 + ... + 173791562.

It is an arithmetic number, because the mean of its divisors is an integer number (5213745120).

Almost surely, 2^20507397413 is an apocalyptic number.

It is an amenable number.

20507397413 is a deficient number, since it is larger than the sum of its proper divisors (347583067).

20507397413 is an equidigital number, since it uses as much as digits as its factorization.

20507397413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347583066.

The product of its (nonzero) digits is 158760, while the sum is 41.

The spelling of 20507397413 in words is "twenty billion, five hundred seven million, three hundred ninety-seven thousand, four hundred thirteen".