20287847070 has 48 divisors (see below), whose sum is σ = 52812688032. Its totient is φ = 5403499200.

The previous prime is 20287846981. The next prime is 20287847117. The reversal of 20287847070 is 7074878202.

20287847070 is a `hidden beast` number, since 20 + 28 + 78 + 470 + 70 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62881 + ... + 211020.

It is an arithmetic number, because the mean of its divisors is an integer number (1100264334).

Almost surely, 2^20287847070 is an apocalyptic number.

20287847070 is an abundant number, since it is smaller than the sum of its proper divisors (32524840962).

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

20287847070 is a wasteful number, since it uses less digits than its factorization.

20287847070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274737 (or 274734 counting only the distinct ones).

The product of its (nonzero) digits is 351232, while the sum is 45.

The spelling of 20287847070 in words is "twenty billion, two hundred eighty-seven million, eight hundred forty-seven thousand, seventy".