20345030456661 has 8 divisors (see below), whose sum is σ = 30140785861760. Its totient is φ = 13563353637756.

The previous prime is 20345030456627. The next prime is 20345030456671. The reversal of 20345030456661 is 16665403054302.

It is not a de Polignac number, because 20345030456661 - 2¹³ = 20345030448469 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 (20345030456671) 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, 376759823245 + ... + 376759823298.

It is an arithmetic number, because the mean of its divisors is an integer number (3767598232720).

Almost surely, 2^{20345030456661} is an apocalyptic number.

It is an amenable number.

20345030456661 is a deficient number, since it is larger than the sum of its proper divisors (9795755405099).

20345030456661 is an equidigital number, since it uses as much as digits as its factorization.

20345030456661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753519646552 (or 753519646546 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 45.

The spelling of 20345030456661 in words is "twenty trillion, three hundred forty-five billion, thirty million, four hundred fifty-six thousand, six hundred sixty-one".