19025512490 has 32 divisors (see below), whose sum is σ = 35092881936. Its totient is φ = 7422115840.

The previous prime is 19025512433. The next prime is 19025512501. The reversal of 19025512490 is 9421552091.

It is a Cunningham number, because it is equal to 137933²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 2044034521 + 16981477969 = 45211^2 + 130313^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1664234 + ... + 1675626.

Almost surely, 2^19025512490 is an apocalyptic number.

19025512490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19025512490 is a deficient number, since it is larger than the sum of its proper divisors (16067369446).

19025512490 is a wasteful number, since it uses less digits than its factorization.

19025512490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15514.

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 19025512490 in words is "nineteen billion, twenty-five million, five hundred twelve thousand, four hundred ninety".