2021374917 has 12 divisors (see below), whose sum is σ = 2987665824. Its totient is φ = 1316243880.

The previous prime is 2021374841. The next prime is 2021374921. The reversal of 2021374917 is 7194731202.

It is not a de Polignac number, because 2021374917 - 2¹¹ = 2021372869 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021374217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2611209 + ... + 2611982.

It is an arithmetic number, because the mean of its divisors is an integer number (248972152).

Almost surely, 2^2021374917 is an apocalyptic number.

It is an amenable number.

2021374917 is a deficient number, since it is larger than the sum of its proper divisors (966290907).

2021374917 is a wasteful number, since it uses less digits than its factorization.

2021374917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5223240 (or 5223237 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 2021374917 is about 44959.7032574727. The cubic root of 2021374917 is about 1264.3936054298.

The spelling of 2021374917 in words is "two billion, twenty-one million, three hundred seventy-four thousand, nine hundred seventeen".