2054660021 has 8 divisors (see below), whose sum is σ = 2061056160. Its totient is φ = 2048275152.

The previous prime is 2054660009. The next prime is 2054660029. The reversal of 2054660021 is 1200664502.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2054660021 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 (2054660029) 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, 482126 + ... + 486368.

It is an arithmetic number, because the mean of its divisors is an integer number (257632020).

Almost surely, 2^2054660021 is an apocalyptic number.

It is an amenable number.

2054660021 is a deficient number, since it is larger than the sum of its proper divisors (6396139).

2054660021 is an equidigital number, since it uses as much as digits as its factorization.

2054660021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5635.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 2054660021 is about 45328.3578017117. The cubic root of 2054660021 is about 1271.2959307604.

The spelling of 2054660021 in words is "two billion, fifty-four million, six hundred sixty thousand, twenty-one".