20822671 has 4 divisors (see below), whose sum is σ = 22047552. Its totient is φ = 19597792.

The previous prime is 20822663. The next prime is 20822677. The reversal of 20822671 is 17622802.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20822671 - 2³ = 20822663 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 (20822677) 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, 612415 + ... + 612448.

It is an arithmetic number, because the mean of its divisors is an integer number (5511888).

Almost surely, 2^20822671 is an apocalyptic number.

20822671 is a deficient number, since it is larger than the sum of its proper divisors (1224881).

20822671 is a wasteful number, since it uses less digits than its factorization.

20822671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224880.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 20822671 is about 4563.1864962984. The cubic root of 20822671 is about 275.1136543989.

It can be divided in two parts, 2082 and 2671, that added together give a triangular number (4753 = T₉₇).

The spelling of 20822671 in words is "twenty million, eight hundred twenty-two thousand, six hundred seventy-one".