19881254885 has 4 divisors (see below), whose sum is σ = 23857505868. Its totient is φ = 15905003904.

The previous prime is 19881254879. The next prime is 19881254933. The reversal of 19881254885 is 58845218891.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2710035364 + 17171219521 = 52058^2 + 131039^2 .

It is a cyclic number.

It is not a de Polignac number, because 19881254885 - 2¹² = 19881250789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1988125484 + ... + 1988125493.

It is an arithmetic number, because the mean of its divisors is an integer number (5964376467).

Almost surely, 2^19881254885 is an apocalyptic number.

It is an amenable number.

19881254885 is a deficient number, since it is larger than the sum of its proper divisors (3976250983).

19881254885 is an equidigital number, since it uses as much as digits as its factorization.

19881254885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3976250982.

The product of its digits is 7372800, while the sum is 59.

The spelling of 19881254885 in words is "nineteen billion, eight hundred eighty-one million, two hundred fifty-four thousand, eight hundred eighty-five".