20822742 has 12 divisors (see below), whose sum is σ = 45115980. Its totient is φ = 6940908.

The previous prime is 20822717. The next prime is 20822821. The reversal of 20822742 is 24722802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 578392 + ... + 578427.

It is an arithmetic number, because the mean of its divisors is an integer number (3759665).

Almost surely, 2^20822742 is an apocalyptic number.

20822742 is an abundant number, since it is smaller than the sum of its proper divisors (24293238).

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

20822742 is a wasteful number, since it uses less digits than its factorization.

20822742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156827 (or 1156824 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 20822742 is about 4563.1942759431. The cubic root of 20822742 is about 275.1139670876.

The spelling of 20822742 in words is "twenty million, eight hundred twenty-two thousand, seven hundred forty-two".