20660621043 has 8 divisors (see below), whose sum is σ = 27550368000. Its totient is φ = 13772310728.

The previous prime is 20660621027. The next prime is 20660621077. The reversal of 20660621043 is 34012606602.

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 20660621043 - 2⁴ = 20660621027 is a prime.

It is a super-2 number, since 2×20660621043² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20660621043.

It is not an unprimeable number, because it can be changed into a prime (20660621083) 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, 325143 + ... + 383456.

It is an arithmetic number, because the mean of its divisors is an integer number (3443796000).

Almost surely, 2^20660621043 is an apocalyptic number.

20660621043 is a deficient number, since it is larger than the sum of its proper divisors (6889746957).

20660621043 is an equidigital number, since it uses as much as digits as its factorization.

20660621043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718321.

The product of its (nonzero) digits is 10368, while the sum is 30.

The spelling of 20660621043 in words is "twenty billion, six hundred sixty million, six hundred twenty-one thousand, forty-three".