20011969153 has 4 divisors (see below), whose sum is σ = 21831239088. Its totient is φ = 18192699220.

The previous prime is 20011969151. The next prime is 20011969157. The reversal of 20011969153 is 35196911002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20011969153 - 2¹ = 20011969151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20011969151) 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, 909634951 + ... + 909634972.

It is an arithmetic number, because the mean of its divisors is an integer number (5457809772).

Almost surely, 2^20011969153 is an apocalyptic number.

It is an amenable number.

20011969153 is a deficient number, since it is larger than the sum of its proper divisors (1819269935).

20011969153 is a wasteful number, since it uses less digits than its factorization.

20011969153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1819269934.

The product of its (nonzero) digits is 14580, while the sum is 37.

The spelling of 20011969153 in words is "twenty billion, eleven million, nine hundred sixty-nine thousand, one hundred fifty-three".