20606112421 has 2 divisors, whose sum is σ = 20606112422. Its totient is φ = 20606112420.

The previous prime is 20606112379. The next prime is 20606112463. The reversal of 20606112421 is 12421160602.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (20606112379) and next prime (20606112463).

It can be written as a sum of positive squares in only one way, i.e., 20524860225 + 81252196 = 143265^2 + 9014^2 .

It is a cyclic number.

It is not a de Polignac number, because 20606112421 - 2¹⁵ = 20606079653 is a prime.

It is a super-2 number, since 2×20606112421² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20606112491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10303056210 + 10303056211.

It is an arithmetic number, because the mean of its divisors is an integer number (10303056211).

Almost surely, 2^20606112421 is an apocalyptic number.

It is an amenable number.

20606112421 is a deficient number, since it is larger than the sum of its proper divisors (1).

20606112421 is an equidigital number, since it uses as much as digits as its factorization.

20606112421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The spelling of 20606112421 in words is "twenty billion, six hundred six million, one hundred twelve thousand, four hundred twenty-one".