2021197479 has 16 divisors (see below), whose sum is σ = 3080571648. Its totient is φ = 1154725632.

The previous prime is 2021197469. The next prime is 2021197481. The reversal of 2021197479 is 9747911202.

It is not a de Polignac number, because 2021197479 - 2⁴ = 2021197463 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2021197479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021197469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150144 + ... + 163050.

It is an arithmetic number, because the mean of its divisors is an integer number (192535728).

Almost surely, 2^2021197479 is an apocalyptic number.

2021197479 is a deficient number, since it is larger than the sum of its proper divisors (1059374169).

2021197479 is a wasteful number, since it uses less digits than its factorization.

2021197479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20374.

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 2021197479 is about 44957.7299137757. The cubic root of 2021197479 is about 1264.3566078339.

The spelling of 2021197479 in words is "two billion, twenty-one million, one hundred ninety-seven thousand, four hundred seventy-nine".