10021195620 has 36 divisors (see below), whose sum is σ = 30397627260. Its totient is φ = 2672318784.

The previous prime is 10021195619. The next prime is 10021195637. The reversal of 10021195620 is 2659112001.

10021195620 is a `hidden beast` number, since 1 + 0 + 0 + 21 + 19 + 5 + 620 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1491195456 + 8530000164 = 38616^2 + 92358^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27836475 + ... + 27836834.

It is an arithmetic number, because the mean of its divisors is an integer number (844378535).

Almost surely, 2^10021195620 is an apocalyptic number.

10021195620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10021195620 is an abundant number, since it is smaller than the sum of its proper divisors (20376431640).

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

10021195620 is a wasteful number, since it uses less digits than its factorization.

10021195620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55673324 (or 55673319 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The spelling of 10021195620 in words is "ten billion, twenty-one million, one hundred ninety-five thousand, six hundred twenty".