2021655063 has 4 divisors (see below), whose sum is σ = 2695540088. Its totient is φ = 1347770040.

The previous prime is 2021655061. The next prime is 2021655067. The reversal of 2021655063 is 3605561202.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2021655063 - 2¹ = 2021655061 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2021655063.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021655061) 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, 336942508 + ... + 336942513.

It is an arithmetic number, because the mean of its divisors is an integer number (673885022).

Almost surely, 2^2021655063 is an apocalyptic number.

2021655063 is a deficient number, since it is larger than the sum of its proper divisors (673885025).

2021655063 is an equidigital number, since it uses as much as digits as its factorization.

2021655063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673885024.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 2021655063 is about 44962.8186727656. The cubic root of 2021655063 is about 1264.4520142626.

The spelling of 2021655063 in words is "two billion, twenty-one million, six hundred fifty-five thousand, sixty-three".