919100020 has 24 divisors (see below), whose sum is σ = 1934940168. Its totient is φ = 366720000.

The previous prime is 919099991. The next prime is 919100029. The reversal of 919100020 is 20001919.

919100020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 365344996 + 553755024 = 19114^2 + 23532^2 .

It is a junction number, because it is equal to n+sod(n) for n = 919099964 and 919100000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (919100029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49281 + ... + 65320.

It is an arithmetic number, because the mean of its divisors is an integer number (80622507).

Almost surely, 2^919100020 is an apocalyptic number.

It is an amenable number.

919100020 is an abundant number, since it is smaller than the sum of its proper divisors (1015840148).

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

919100020 is a wasteful number, since it uses less digits than its factorization.

919100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115011 (or 115009 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 919100020 is about 30316.6624152462. The cubic root of 919100020 is about 972.2715812667.

Adding to 919100020 its reverse (20001919), we get a palindrome (939101939).

The spelling of 919100020 in words is "nine hundred nineteen million, one hundred thousand, twenty".