19900027 has 6 divisors (see below), whose sum is σ = 23149068. Its totient is φ = 17057124.

The previous prime is 19900009. The next prime is 19900057. The reversal of 19900027 is 72000991.

It is not a de Polignac number, because 19900027 - 2¹⁵ = 19867259 is a prime.

It is a super-2 number, since 2×19900027² = 792022149201458, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19899968 and 19900004.

It is not an unprimeable number, because it can be changed into a prime (19900057) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 203013 + ... + 203110.

It is an arithmetic number, because the mean of its divisors is an integer number (3858178).

Almost surely, 2^19900027 is an apocalyptic number.

19900027 is a deficient number, since it is larger than the sum of its proper divisors (3249041).

19900027 is an equidigital number, since it uses as much as digits as its factorization.

19900027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406137 (or 406130 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 19900027 is about 4460.9446309050. The cubic root of 19900027 is about 270.9887251746.

The spelling of 19900027 in words is "nineteen million, nine hundred thousand, twenty-seven".