20077806 has 32 divisors (see below), whose sum is σ = 46545408. Its totient is φ = 5654880.

The previous prime is 20077769. The next prime is 20077807. The reversal of 20077806 is 60877002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20077807) 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, 385 + ... + 6348.

It is an arithmetic number, because the mean of its divisors is an integer number (1454544).

Almost surely, 2^20077806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20077806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23272704).

20077806 is an abundant number, since it is smaller than the sum of its proper divisors (26467602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20077806 is a wasteful number, since it uses less digits than its factorization.

20077806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6816.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 20077806 is about 4480.8264862634. The cubic root of 20077806 is about 271.7933028144.

The spelling of 20077806 in words is "twenty million, seventy-seven thousand, eight hundred six".