19140657 has 16 divisors (see below), whose sum is σ = 28445760. Its totient is φ = 11377152.

The previous prime is 19140647. The next prime is 19140679. The reversal of 19140657 is 75604191.

It is not a de Polignac number, because 19140657 - 2¹² = 19136561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19140617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8908 + ... + 10845.

It is an arithmetic number, because the mean of its divisors is an integer number (1777860).

Almost surely, 2^19140657 is an apocalyptic number.

19140657 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

19140657 is a deficient number, since it is larger than the sum of its proper divisors (9305103).

19140657 is a wasteful number, since it uses less digits than its factorization.

19140657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19792.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 19140657 is about 4375.0036571413. The cubic root of 19140657 is about 267.4970192116.

The spelling of 19140657 in words is "nineteen million, one hundred forty thousand, six hundred fifty-seven".