20012071 has 8 divisors (see below), whose sum is σ = 20553104. Its totient is φ = 19474560.

The previous prime is 20012063. The next prime is 20012099. The reversal of 20012071 is 17021002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20012071 - 2³ = 20012063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13801 + ... + 15181.

It is an arithmetic number, because the mean of its divisors is an integer number (2569138).

Almost surely, 2^20012071 is an apocalyptic number.

20012071 is a deficient number, since it is larger than the sum of its proper divisors (541033).

20012071 is a wasteful number, since it uses less digits than its factorization.

20012071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 20012071 is about 4473.4853302543. The cubic root of 20012071 is about 271.4963602351.

Adding to 20012071 its reverse (17021002), we get a palindrome (37033073).

The spelling of 20012071 in words is "twenty million, twelve thousand, seventy-one".