20275532787 has 16 divisors (see below), whose sum is σ = 28036743840. Its totient is φ = 13018021632.

The previous prime is 20275532779. The next prime is 20275532789. The reversal of 20275532787 is 78723557202.

It is not a de Polignac number, because 20275532787 - 2³ = 20275532779 is a prime.

It is a super-2 number, since 2×20275532787² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20275532789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 258978 + ... + 328055.

It is an arithmetic number, because the mean of its divisors is an integer number (1752296490).

Almost surely, 2^20275532787 is an apocalyptic number.

20275532787 is a deficient number, since it is larger than the sum of its proper divisors (7761211053).

20275532787 is a wasteful number, since it uses less digits than its factorization.

20275532787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587462.

The product of its (nonzero) digits is 1646400, while the sum is 48.

The spelling of 20275532787 in words is "twenty billion, two hundred seventy-five million, five hundred thirty-two thousand, seven hundred eighty-seven".