2021736090 has 32 divisors (see below), whose sum is σ = 5293273536. Its totient is φ = 490117760.

The previous prime is 2021736077. The next prime is 2021736109. The reversal of 2021736090 is 906371202.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3062907 + ... + 3063566.

It is an arithmetic number, because the mean of its divisors is an integer number (165414798).

Almost surely, 2^2021736090 is an apocalyptic number.

2021736090 is an abundant number, since it is smaller than the sum of its proper divisors (3271537446).

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

2021736090 is a wasteful number, since it uses less digits than its factorization.

2021736090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6126494.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 2021736090 is about 44963.7197082270. The cubic root of 2021736090 is about 1264.4689069209.

The spelling of 2021736090 in words is "two billion, twenty-one million, seven hundred thirty-six thousand, ninety".