20001672069 has 16 divisors (see below), whose sum is σ = 27129062400. Its totient is φ = 13104500976.

The previous prime is 20001672049. The next prime is 20001672071. The reversal of 20001672069 is 96027610002.

It is not a de Polignac number, because 20001672069 - 2¹⁹ = 20001147781 is a prime.

It is a super-2 number, since 2×20001672069² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001672029) 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, 646692 + ... + 676914.

It is an arithmetic number, because the mean of its divisors is an integer number (1695566400).

Almost surely, 2^20001672069 is an apocalyptic number.

It is an amenable number.

20001672069 is a deficient number, since it is larger than the sum of its proper divisors (7127390331).

20001672069 is a wasteful number, since it uses less digits than its factorization.

20001672069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34024.

The product of its (nonzero) digits is 9072, while the sum is 33.

The spelling of 20001672069 in words is "twenty billion, one million, six hundred seventy-two thousand, sixty-nine".