19740855 has 16 divisors (see below), whose sum is σ = 31641984. Its totient is φ = 10509600.

The previous prime is 19740841. The next prime is 19740863. The reversal of 19740855 is 55804791.

19740855 = 1985² + 1986² + ... + 1989².

It is not a de Polignac number, because 19740855 - 2⁴ = 19740839 is a prime.

It is a super-2 number, since 2×19740855² = 779402712262050, which contains 22 as substring.

It is a congruent number.

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, 12880 + ... + 14330.

It is an arithmetic number, because the mean of its divisors is an integer number (1977624).

Almost surely, 2^19740855 is an apocalyptic number.

19740855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19740855 is a deficient number, since it is larger than the sum of its proper divisors (11901129).

19740855 is a wasteful number, since it uses less digits than its factorization.

19740855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2366.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 19740855 is about 4443.0681966407. The cubic root of 19740855 is about 270.2642816975.

The spelling of 19740855 in words is "nineteen million, seven hundred forty thousand, eight hundred fifty-five".