20894881416 has 16 divisors (see below), whose sum is σ = 52237203600. Its totient is φ = 6964960464.

The previous prime is 20894881393. The next prime is 20894881417. The reversal of 20894881416 is 61418849802.

It is not an unprimeable number, because it can be changed into a prime (20894881417) 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, 435310006 + ... + 435310053.

It is an arithmetic number, because the mean of its divisors is an integer number (3264825225).

Almost surely, 2^20894881416 is an apocalyptic number.

It is an amenable number.

20894881416 is an abundant number, since it is smaller than the sum of its proper divisors (31342322184).

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

20894881416 is a wasteful number, since it uses less digits than its factorization.

20894881416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870620068 (or 870620064 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 51.

The spelling of 20894881416 in words is "twenty billion, eight hundred ninety-four million, eight hundred eighty-one thousand, four hundred sixteen".