20477363513 has 4 divisors (see below), whose sum is σ = 20478438288. Its totient is φ = 20476288740.

The previous prime is 20477363479. The next prime is 20477363537. The reversal of 20477363513 is 31536377402.

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: 31536377402 = 2 ⋅15768188701.

It is a cyclic number.

It is not a de Polignac number, because 20477363513 - 2¹² = 20477359417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20477363573) 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, 508283 + ... + 547088.

It is an arithmetic number, because the mean of its divisors is an integer number (5119609572).

Almost surely, 2^20477363513 is an apocalyptic number.

It is an amenable number.

20477363513 is a deficient number, since it is larger than the sum of its proper divisors (1074775).

20477363513 is a wasteful number, since it uses less digits than its factorization.

20477363513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074774.

The product of its (nonzero) digits is 317520, while the sum is 41.

The spelling of 20477363513 in words is "twenty billion, four hundred seventy-seven million, three hundred sixty-three thousand, five hundred thirteen".