20147724170 has 32 divisors (see below), whose sum is σ = 41540370048. Its totient is φ = 6892187328.

The previous prime is 20147724143. The next prime is 20147724193. The reversal of 20147724170 is 7142774102.

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 20147724170.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293849 + ... + 355868.

It is an arithmetic number, because the mean of its divisors is an integer number (1298136564).

Almost surely, 2^20147724170 is an apocalyptic number.

20147724170 is an abundant number, since it is smaller than the sum of its proper divisors (21392645878).

20147724170 is a wasteful number, since it uses less digits than its factorization.

20147724170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650174.

The product of its (nonzero) digits is 21952, while the sum is 35.

The spelling of 20147724170 in words is "twenty billion, one hundred forty-seven million, seven hundred twenty-four thousand, one hundred seventy".