20861436054 has 8 divisors (see below), whose sum is σ = 41722872120. Its totient is φ = 6953812016.

The previous prime is 20861436031. The next prime is 20861436067. The reversal of 20861436054 is 45063416802.

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

20861436054 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1738452999 + ... + 1738453010.

It is an arithmetic number, because the mean of its divisors is an integer number (5215359015).

Almost surely, 2^20861436054 is an apocalyptic number.

20861436054 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20861436054 is a wasteful number, since it uses less digits than its factorization.

20861436054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3476906014.

The product of its (nonzero) digits is 138240, while the sum is 39.

The spelling of 20861436054 in words is "twenty billion, eight hundred sixty-one million, four hundred thirty-six thousand, fifty-four".