20853947028 has 12 divisors (see below), whose sum is σ = 48659209760. Its totient is φ = 6951315672.

The previous prime is 20853946969. The next prime is 20853947029. The reversal of 20853947028 is 82074935802.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20853947029) 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, 868914448 + ... + 868914471.

Almost surely, 2^20853947028 is an apocalyptic number.

It is an amenable number.

20853947028 is an abundant number, since it is smaller than the sum of its proper divisors (27805262732).

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

20853947028 is a wasteful number, since it uses less digits than its factorization.

20853947028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1737828926 (or 1737828924 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 20853947028 in words is "twenty billion, eight hundred fifty-three million, nine hundred forty-seven thousand, twenty-eight".