20263087845 has 384 divisors, whose sum is σ = 50892226560. Its totient is φ = 7511616000.

The previous prime is 20263087841. The next prime is 20263087847. The reversal of 20263087845 is 54878036202.

20263087845 is a `hidden beast` number, since 2 + 0 + 2 + 630 + 8 + 7 + 8 + 4 + 5 = 666.

It is not a de Polignac number, because 20263087845 - 2² = 20263087841 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20263087845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20263087841) by changing a digit.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 29323950 + ... + 29324640.

It is an arithmetic number, because the mean of its divisors is an integer number (132531840).

Almost surely, 2^20263087845 is an apocalyptic number.

It is an amenable number.

20263087845 is an abundant number, since it is smaller than the sum of its proper divisors (30629138715).

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

20263087845 is a wasteful number, since it uses less digits than its factorization.

20263087845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774 (or 761 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 20263087845 in words is "twenty billion, two hundred sixty-three million, eighty-seven thousand, eight hundred forty-five".