20012154499 has 2 divisors, whose sum is σ = 20012154500. Its totient is φ = 20012154498.

The previous prime is 20012154473. The next prime is 20012154557. The reversal of 20012154499 is 99445121002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20012154499 - 2¹³ = 20012146307 is a prime.

It is not a weakly prime, because it can be changed into another prime (20012154419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006077249 + 10006077250.

It is an arithmetic number, because the mean of its divisors is an integer number (10006077250).

Almost surely, 2^20012154499 is an apocalyptic number.

20012154499 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012154499 is an equidigital number, since it uses as much as digits as its factorization.

20012154499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 20012154499 in words is "twenty billion, twelve million, one hundred fifty-four thousand, four hundred ninety-nine".