20351550807 has 48 divisors (see below), whose sum is σ = 36366785280. Its totient is φ = 11017343952.

The previous prime is 20351550773. The next prime is 20351550811. The reversal of 20351550807 is 70805515302.

20351550807 is a `hidden beast` number, since 20 + 3 + 5 + 1 + 550 + 80 + 7 = 666.

It is not a de Polignac number, because 20351550807 - 2⁸ = 20351550551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20351550847) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 80913 + ... + 217370.

It is an arithmetic number, because the mean of its divisors is an integer number (757641360).

Almost surely, 2^20351550807 is an apocalyptic number.

20351550807 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20351550807 is a deficient number, since it is larger than the sum of its proper divisors (16015234473).

20351550807 is a wasteful number, since it uses less digits than its factorization.

20351550807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298337 (or 298312 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The spelling of 20351550807 in words is "twenty billion, three hundred fifty-one million, five hundred fifty thousand, eight hundred seven".