20408452131267 has 24 divisors (see below), whose sum is σ = 29540888035568. Its totient is φ = 13577033376000.

The previous prime is 20408452131253. The next prime is 20408452131299. The reversal of 20408452131267 is 76213125480402.

20408452131267 is a `hidden beast` number, since 2 + 0 + 4 + 0 + 8 + 452 + 131 + 2 + 67 = 666.

It is not a de Polignac number, because 20408452131267 - 2¹⁶ = 20408452065731 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20408452131367) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11510868 + ... + 13164990.

Almost surely, 2^{20408452131267} is an apocalyptic number.

20408452131267 is a deficient number, since it is larger than the sum of its proper divisors (9132435904301).

20408452131267 is a wasteful number, since it uses less digits than its factorization.

20408452131267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657011 (or 1657008 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 20408452131267 in words is "twenty trillion, four hundred eight billion, four hundred fifty-two million, one hundred thirty-one thousand, two hundred sixty-seven".