20277774 has 48 divisors (see below), whose sum is σ = 48971520. Its totient is φ = 6011280.

The previous prime is 20277773. The next prime is 20277793. The reversal of 20277774 is 47777202.

It is a super-2 number, since 2×20277774² = 822376236790152, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20277773) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8217 + ... + 10395.

It is an arithmetic number, because the mean of its divisors is an integer number (1020240).

Almost surely, 2^20277774 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20277774, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24485760).

20277774 is an abundant number, since it is smaller than the sum of its proper divisors (28693746).

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

20277774 is a wasteful number, since it uses less digits than its factorization.

20277774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2245 (or 2242 counting only the distinct ones).

The product of its (nonzero) digits is 38416, while the sum is 36.

The square root of 20277774 is about 4503.0849425699. The cubic root of 20277774 is about 272.6926460887.

It can be divided in two parts, 2027 and 7774, that added together give a square (9801 = 99²).

The spelling of 20277774 in words is "twenty million, two hundred seventy-seven thousand, seven hundred seventy-four".