10019881 has 4 divisors (see below), whose sum is σ = 10455552. Its totient is φ = 9584212.

The previous prime is 10019839. The next prime is 10019909. The reversal of 10019881 is 18891001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18891001 = 113 ⋅167177.

It is a cyclic number.

It is not a de Polignac number, because 10019881 - 2⁹ = 10019369 is a prime.

It is a super-2 number, since 2×10019881² = 200796030508322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10019831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217801 + ... + 217846.

It is an arithmetic number, because the mean of its divisors is an integer number (2613888).

Almost surely, 2^10019881 is an apocalyptic number.

It is an amenable number.

10019881 is a deficient number, since it is larger than the sum of its proper divisors (435671).

10019881 is an equidigital number, since it uses as much as digits as its factorization.

10019881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435670.

The product of its (nonzero) digits is 576, while the sum is 28.

The square root of 10019881 is about 3165.4195614484. The cubic root of 10019881 is about 215.5861488779.

It can be divided in two parts, 100 and 19881, that multiplied together give a square (1988100 = 1410²).

The spelling of 10019881 in words is "ten million, nineteen thousand, eight hundred eighty-one".