20102077 has 8 divisors (see below), whose sum is σ = 20519136. Its totient is φ = 19688592.

The previous prime is 20102029. The next prime is 20102087. The reversal of 20102077 is 77020102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20102077 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 (20102087) 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, 12438 + ... + 13960.

It is an arithmetic number, because the mean of its divisors is an integer number (2564892).

Almost surely, 2^20102077 is an apocalyptic number.

It is an amenable number.

20102077 is a deficient number, since it is larger than the sum of its proper divisors (417059).

20102077 is a wasteful number, since it uses less digits than its factorization.

20102077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1787.

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

The square root of 20102077 is about 4483.5339855966. The cubic root of 20102077 is about 271.9027775732.

Adding to 20102077 its reverse (77020102), we get a palindrome (97122179).

The spelling of 20102077 in words is "twenty million, one hundred two thousand, seventy-seven".