20412403551 has 12 divisors (see below), whose sum is σ = 31036403320. Its totient is φ = 12892044240.

The previous prime is 20412403463. The next prime is 20412403597. The reversal of 20412403551 is 15530421402.

20412403551 is a `hidden beast` number, since 204 + 1 + 2 + 403 + 5 + 51 = 666.

It is not a de Polignac number, because 20412403551 - 2¹⁷ = 20412272479 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 (20412403351) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59685220 + ... + 59685561.

Almost surely, 2^20412403551 is an apocalyptic number.

20412403551 is a deficient number, since it is larger than the sum of its proper divisors (10623999769).

20412403551 is a wasteful number, since it uses less digits than its factorization.

20412403551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119370806 (or 119370803 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 20412403551 its reverse (15530421402), we get a palindrome (35942824953).

The spelling of 20412403551 in words is "twenty billion, four hundred twelve million, four hundred three thousand, five hundred fifty-one".