2021642619 has 8 divisors (see below), whose sum is σ = 2696085840. Its totient is φ = 1347480576.

The previous prime is 2021642599. The next prime is 2021642629. The reversal of 2021642619 is 9162461202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2021642619 - 2⁹ = 2021642107 is a prime.

It is a super-2 number, since 2×2021642619² = 8174077757914358322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2021642619.

It is not an unprimeable number, because it can be changed into a prime (2021642629) 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, 52902 + ... + 82715.

It is an arithmetic number, because the mean of its divisors is an integer number (337010730).

Almost surely, 2^2021642619 is an apocalyptic number.

2021642619 is a deficient number, since it is larger than the sum of its proper divisors (674443221).

2021642619 is a wasteful number, since it uses less digits than its factorization.

2021642619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140589.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 2021642619 is about 44962.6802915485. The cubic root of 2021642619 is about 1264.4494198746.

It can be divided in two parts, 20216 and 42619, that added together give a triangular number (62835 = T₃₅₄).

The spelling of 2021642619 in words is "two billion, twenty-one million, six hundred forty-two thousand, six hundred nineteen".