10191020 has 36 divisors (see below), whose sum is σ = 24897600. Its totient is φ = 3493728.

The previous prime is 10191017. The next prime is 10191029. The reversal of 10191020 is 2019101.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 10190986 and 10191004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10191029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4220 + ... + 6179.

It is an arithmetic number, because the mean of its divisors is an integer number (691600).

Almost surely, 2^10191020 is an apocalyptic number.

10191020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10191020 is an abundant number, since it is smaller than the sum of its proper divisors (14706580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10191020 is a wasteful number, since it uses less digits than its factorization.

10191020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10422 (or 10413 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 10191020 is about 3192.3377014345. The cubic root of 10191020 is about 216.8066262051.

The spelling of 10191020 in words is "ten million, one hundred ninety-one thousand, twenty".