20528964090 has 48 divisors (see below), whose sum is σ = 54510962688. Its totient is φ = 5357912928.

The previous prime is 20528964041. The next prime is 20528964103. The reversal of 20528964090 is 9046982502.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2422362 + ... + 2430821.

It is an arithmetic number, because the mean of its divisors is an integer number (1135645056).

Almost surely, 2^20528964090 is an apocalyptic number.

20528964090 is an abundant number, since it is smaller than the sum of its proper divisors (33981998598).

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

20528964090 is a wasteful number, since it uses less digits than its factorization.

20528964090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4853243 (or 4853240 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 20528964090 in words is "twenty billion, five hundred twenty-eight million, nine hundred sixty-four thousand, ninety".