20021466142 has 16 divisors (see below), whose sum is σ = 30340230912. Its totient is φ = 9908224920.

The previous prime is 20021466131. The next prime is 20021466161. The reversal of 20021466142 is 24166412002.

It is a self number, because there is not a number n which added to its sum of digits gives 20021466142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198667 + ... + 281977.

It is an arithmetic number, because the mean of its divisors is an integer number (1896264432).

Almost surely, 2^20021466142 is an apocalyptic number.

20021466142 is a deficient number, since it is larger than the sum of its proper divisors (10318764770).

20021466142 is a wasteful number, since it uses less digits than its factorization.

20021466142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84543.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 20021466142 its reverse (24166412002), we get a palindrome (44187878144).

The spelling of 20021466142 in words is "twenty billion, twenty-one million, four hundred sixty-six thousand, one hundred forty-two".