20461143637 has 8 divisors (see below), whose sum is σ = 22333086720. Its totient is φ = 18591173760.

The previous prime is 20461143629. The next prime is 20461143673. The reversal of 20461143637 is 73634116402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20461143637 - 2³ = 20461143629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20461143596 and 20461143605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20461143617) 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, 471573 + ... + 513130.

It is an arithmetic number, because the mean of its divisors is an integer number (2791635840).

Almost surely, 2^20461143637 is an apocalyptic number.

It is an amenable number.

20461143637 is a deficient number, since it is larger than the sum of its proper divisors (1871943083).

20461143637 is a wasteful number, since it uses less digits than its factorization.

20461143637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986603.

The product of its (nonzero) digits is 72576, while the sum is 37.

The spelling of 20461143637 in words is "twenty billion, four hundred sixty-one million, one hundred forty-three thousand, six hundred thirty-seven".