20771622 has 48 divisors (see below), whose sum is σ = 47443968. Its totient is φ = 6555120.

The previous prime is 20771593. The next prime is 20771629. The reversal of 20771622 is 22617702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20771629) 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, 54043 + ... + 54425.

It is an arithmetic number, because the mean of its divisors is an integer number (988416).

Almost surely, 2^20771622 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20771622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23721984).

20771622 is an abundant number, since it is smaller than the sum of its proper divisors (26672346).

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

20771622 is a wasteful number, since it uses less digits than its factorization.

20771622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545 (or 542 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 20771622 is about 4557.5894944587. The cubic root of 20771622 is about 274.8886469280. Note that the first 3 decimals are identical.

The spelling of 20771622 in words is "twenty million, seven hundred seventy-one thousand, six hundred twenty-two".