2021197478 has 8 divisors (see below), whose sum is σ = 3032384472. Its totient is φ = 1010402656.

The previous prime is 2021197469. The next prime is 2021197481. The reversal of 2021197478 is 8747911202.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84800 + ... + 105987.

It is an arithmetic number, because the mean of its divisors is an integer number (379048059).

Almost surely, 2^2021197478 is an apocalyptic number.

2021197478 is a deficient number, since it is larger than the sum of its proper divisors (1011186994).

2021197478 is a wasteful number, since it uses less digits than its factorization.

2021197478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196086.

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 2021197478 is about 44957.7299026541. The cubic root of 2021197478 is about 1264.3566076254.

The spelling of 2021197478 in words is "two billion, twenty-one million, one hundred ninety-seven thousand, four hundred seventy-eight".