19918141425 has 108 divisors (see below), whose sum is σ = 44150281344. Its totient is φ = 8404905600.

The previous prime is 19918141423. The next prime is 19918141457. The reversal of 19918141425 is 52414181991.

It is a happy number.

19918141425 is a `hidden beast` number, since 1 + 9 + 9 + 181 + 41 + 425 = 666.

It is not a de Polignac number, because 19918141425 - 2¹ = 19918141423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (19918141423) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 228760 + ... + 303590.

Almost surely, 2^19918141425 is an apocalyptic number.

19918141425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19918141425 is an abundant number, since it is smaller than the sum of its proper divisors (24232139919).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19918141425 is a wasteful number, since it uses less digits than its factorization.

19918141425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74880 (or 74859 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The spelling of 19918141425 in words is "nineteen billion, nine hundred eighteen million, one hundred forty-one thousand, four hundred twenty-five".