20210119985 has 12 divisors (see below), whose sum is σ = 26657316084. Its totient is φ = 14698268640.

The previous prime is 20210119957. The next prime is 20210119997. The reversal of 20210119985 is 58991101202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11535619216 + 8674500769 = 107404^2 + 93137^2 .

It is not a de Polignac number, because 20210119985 - 2¹⁰ = 20210118961 is a prime.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 16701974 + ... + 16703183.

It is an arithmetic number, because the mean of its divisors is an integer number (2221443007).

Almost surely, 2^20210119985 is an apocalyptic number.

It is an amenable number.

20210119985 is a deficient number, since it is larger than the sum of its proper divisors (6447196099).

20210119985 is a wasteful number, since it uses less digits than its factorization.

20210119985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33405184 (or 33405173 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 38.

The spelling of 20210119985 in words is "twenty billion, two hundred ten million, one hundred nineteen thousand, nine hundred eighty-five".