20891566094 has 8 divisors (see below), whose sum is σ = 35814113328. Its totient is φ = 8953528320.

The previous prime is 20891566093. The next prime is 20891566139. The reversal of 20891566094 is 49066519802.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20891566093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 746127347 + ... + 746127374.

It is an arithmetic number, because the mean of its divisors is an integer number (4476764166).

Almost surely, 2^20891566094 is an apocalyptic number.

20891566094 is a deficient number, since it is larger than the sum of its proper divisors (14922547234).

20891566094 is a wasteful number, since it uses less digits than its factorization.

20891566094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492254730.

The product of its (nonzero) digits is 933120, while the sum is 50.

The spelling of 20891566094 in words is "twenty billion, eight hundred ninety-one million, five hundred sixty-six thousand, ninety-four".