20122454664461 has 4 divisors (see below), whose sum is σ = 20122584327132. Its totient is φ = 20122325001792.

The previous prime is 20122454664401. The next prime is 20122454664467. The reversal of 20122454664461 is 16446645422102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6373049760100 + 13749404904361 = 2524490^2 + 3708019^2 .

It is a cyclic number.

It is not a de Polignac number, because 20122454664461 - 2¹⁴ = 20122454648077 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 (20122454664467) 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, 64598270 + ... + 64909023.

It is an arithmetic number, because the mean of its divisors is an integer number (5030646081783).

Almost surely, 2^{20122454664461} is an apocalyptic number.

It is an amenable number.

20122454664461 is a deficient number, since it is larger than the sum of its proper divisors (129662671).

20122454664461 is a wasteful number, since it uses less digits than its factorization.

20122454664461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129662670.

The product of its (nonzero) digits is 2211840, while the sum is 47.

The spelling of 20122454664461 in words is "twenty trillion, one hundred twenty-two billion, four hundred fifty-four million, six hundred sixty-four thousand, four hundred sixty-one".