20427242570 has 64 divisors (see below), whose sum is σ = 44256049920. Its totient is φ = 6631621632.

The previous prime is 20427242557. The next prime is 20427242573. The reversal of 20427242570 is 7524272402.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 20427242570.

It is not an unprimeable number, because it can be changed into a prime (20427242573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4888322 + ... + 4892498.

It is an arithmetic number, because the mean of its divisors is an integer number (691500780).

Almost surely, 2^20427242570 is an apocalyptic number.

20427242570 is an abundant number, since it is smaller than the sum of its proper divisors (23828807350).

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

20427242570 is a wasteful number, since it uses less digits than its factorization.

20427242570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7887.

The product of its (nonzero) digits is 62720, while the sum is 35.

The spelling of 20427242570 in words is "twenty billion, four hundred twenty-seven million, two hundred forty-two thousand, five hundred seventy".