2019997894 has 8 divisors (see below), whose sum is σ = 3042570168. Its totient is φ = 1005807840.

The previous prime is 2019997891. The next prime is 2019997897. The reversal of 2019997894 is 4987999102.

It is an interprime number because it is at equal distance from previous prime (2019997891) and next prime (2019997897).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2019997891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2094952 + ... + 2095915.

It is an arithmetic number, because the mean of its divisors is an integer number (380321271).

Almost surely, 2^2019997894 is an apocalyptic number.

2019997894 is a deficient number, since it is larger than the sum of its proper divisors (1022572274).

2019997894 is a wasteful number, since it uses less digits than its factorization.

2019997894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4191110.

The product of its (nonzero) digits is 2939328, while the sum is 58.

The square root of 2019997894 is about 44944.3866795399. The cubic root of 2019997894 is about 1264.1064255547.

The spelling of 2019997894 in words is "two billion, nineteen million, nine hundred ninety-seven thousand, eight hundred ninety-four".