20012077 has 4 divisors (see below), whose sum is σ = 21189276. Its totient is φ = 18834880.

The previous prime is 20012063. The next prime is 20012099. The reversal of 20012077 is 77021002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77021002 = 2 ⋅38510501.

It can be written as a sum of positive squares in 2 ways, for example, as 14280841 + 5731236 = 3779^2 + 2394^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20012077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010077) 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, 588574 + ... + 588607.

It is an arithmetic number, because the mean of its divisors is an integer number (5297319).

Almost surely, 2^20012077 is an apocalyptic number.

It is an amenable number.

20012077 is a deficient number, since it is larger than the sum of its proper divisors (1177199).

20012077 is a wasteful number, since it uses less digits than its factorization.

20012077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177198.

The product of its (nonzero) digits is 196, while the sum is 19.

The square root of 20012077 is about 4473.4860008723. The cubic root of 20012077 is about 271.4963873683.

Adding to 20012077 its reverse (77021002), we get a palindrome (97033079).

The spelling of 20012077 in words is "twenty million, twelve thousand, seventy-seven".