20021011147 has 4 divisors (see below), whose sum is σ = 20215390000. Its totient is φ = 19826632296.

The previous prime is 20021011103. The next prime is 20021011229. The reversal of 20021011147 is 74111012002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20021011147 - 2⁷ = 20021011019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021011547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97189272 + ... + 97189477.

It is an arithmetic number, because the mean of its divisors is an integer number (5053847500).

Almost surely, 2^20021011147 is an apocalyptic number.

20021011147 is a deficient number, since it is larger than the sum of its proper divisors (194378853).

20021011147 is a wasteful number, since it uses less digits than its factorization.

20021011147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194378852.

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 20021011147 its reverse (74111012002), we get a palindrome (94132023149).

The spelling of 20021011147 in words is "twenty billion, twenty-one million, eleven thousand, one hundred forty-seven".