20436056461 has 32 divisors (see below), whose sum is σ = 22469990400. Its totient is φ = 18520669440.

The previous prime is 20436056453. The next prime is 20436056489. The reversal of 20436056461 is 16465063402.

It is a cyclic number.

It is not a de Polignac number, because 20436056461 - 2³ = 20436056453 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20436056461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20436056491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8453925 + ... + 8456341.

It is an arithmetic number, because the mean of its divisors is an integer number (702187200).

Almost surely, 2^20436056461 is an apocalyptic number.

It is an amenable number.

20436056461 is a deficient number, since it is larger than the sum of its proper divisors (2033933939).

20436056461 is a wasteful number, since it uses less digits than its factorization.

20436056461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2689.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 20436056461 in words is "twenty billion, four hundred thirty-six million, fifty-six thousand, four hundred sixty-one".