20251546061 has 4 divisors (see below), whose sum is σ = 20295476124. Its totient is φ = 20207616000.

The previous prime is 20251546033. The next prime is 20251546087. The reversal of 20251546061 is 16064515202.

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 8282092036 + 11969454025 = 91006^2 + 109405^2 .

It is a cyclic number.

It is not a de Polignac number, because 20251546061 - 2³⁰ = 19177804237 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 (20251546561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21964340 + ... + 21965261.

It is an arithmetic number, because the mean of its divisors is an integer number (5073869031).

Almost surely, 2^20251546061 is an apocalyptic number.

It is an amenable number.

20251546061 is a deficient number, since it is larger than the sum of its proper divisors (43930063).

20251546061 is an equidigital number, since it uses as much as digits as its factorization.

20251546061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43930062.

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 20251546061 in words is "twenty billion, two hundred fifty-one million, five hundred forty-six thousand, sixty-one".