20021011149 has 16 divisors (see below), whose sum is σ = 26822179008. Its totient is φ = 13283636352.

The previous prime is 20021011103. The next prime is 20021011229. The reversal of 20021011149 is 94111012002.

It is a happy number.

It is not a de Polignac number, because 20021011149 - 2⁹ = 20021010637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021011649) 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, 3536329 + ... + 3541985.

It is an arithmetic number, because the mean of its divisors is an integer number (1676386188).

Almost surely, 2^20021011149 is an apocalyptic number.

It is an amenable number.

20021011149 is a deficient number, since it is larger than the sum of its proper divisors (6801167859).

20021011149 is a wasteful number, since it uses less digits than its factorization.

20021011149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11084.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 20021011149 in words is "twenty billion, twenty-one million, eleven thousand, one hundred forty-nine".