2021664142733 has 4 divisors (see below), whose sum is σ = 2041291950048. Its totient is φ = 2002036335420.

The previous prime is 2021664142721. The next prime is 2021664142741. The reversal of 2021664142733 is 3372414661202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021664142733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021664142753) 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, 9813903503 + ... + 9813903708.

It is an arithmetic number, because the mean of its divisors is an integer number (510322987512).

Almost surely, 2^{2021664142733} is an apocalyptic number.

It is an amenable number.

2021664142733 is a deficient number, since it is larger than the sum of its proper divisors (19627807315).

2021664142733 is a wasteful number, since it uses less digits than its factorization.

2021664142733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19627807314.

The product of its (nonzero) digits is 290304, while the sum is 41.

The spelling of 2021664142733 in words is "two trillion, twenty-one billion, six hundred sixty-four million, one hundred forty-two thousand, seven hundred thirty-three".