2019693481 has 9 divisors (see below), whose sum is σ = 2187638181. Its totient is φ = 1863793152.

The previous prime is 2019693461. The next prime is 2019693499. The reversal of 2019693481 is 1843969102.

It is a happy number.

The square root of 2019693481 is 44941.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1529513881 + 490179600 = 39109^2 + 22140^2 .

It is not a de Polignac number, because 2019693481 - 2¹⁷ = 2019562409 is a prime.

It is a super-2 number, since 2×2019693481² = 8158323514387794722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2019693421) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 582505 + ... + 585961.

It is an arithmetic number, because the mean of its divisors is an integer number (243070909).

Almost surely, 2^2019693481 is an apocalyptic number.

2019693481 is the 44941-st square number.

2019693481 is the 22471-st centered octagonal number.

It is an amenable number.

2019693481 is a deficient number, since it is larger than the sum of its proper divisors (167944700).

2019693481 is an frugal number, since it uses more digits than its factorization.

2019693481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6940 (or 3470 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The cubic root of 2019693481 is about 1264.0429222276.

The spelling of 2019693481 in words is "two billion, nineteen million, six hundred ninety-three thousand, four hundred eighty-one".