2146645021 has 8 divisors (see below), whose sum is σ = 2225270880. Its totient is φ = 2069103888.

The previous prime is 2146645013. The next prime is 2146645037. The reversal of 2146645021 is 1205466412.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2146645021 - 2³ = 2146645013 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 (2146645001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267151 + ... + 275068.

It is an arithmetic number, because the mean of its divisors is an integer number (278158860).

Almost surely, 2^2146645021 is an apocalyptic number.

It is an amenable number.

2146645021 is a deficient number, since it is larger than the sum of its proper divisors (78625859).

2146645021 is a wasteful number, since it uses less digits than its factorization.

2146645021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542363.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 2146645021 is about 46331.9006840859. The cubic root of 2146645021 is about 1289.9911905734.

The spelling of 2146645021 in words is "two billion, one hundred forty-six million, six hundred forty-five thousand, twenty-one".