20422710 has 144 divisors (see below), whose sum is σ = 67543632. Its totient is φ = 4233600.

The previous prime is 20422697. The next prime is 20422723. The reversal of 20422710 is 1722402.

It is an interprime number because it is at equal distance from previous prime (20422697) and next prime (20422723).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 48300 + ... + 48720.

It is an arithmetic number, because the mean of its divisors is an integer number (469053).

Almost surely, 2^20422710 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20422710, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33771816).

20422710 is an abundant number, since it is smaller than the sum of its proper divisors (47120922).

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

20422710 is a wasteful number, since it uses less digits than its factorization.

20422710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 20422710 is about 4519.1492562207. The cubic root of 20422710 is about 273.3407972712.

The spelling of 20422710 in words is "twenty million, four hundred twenty-two thousand, seven hundred ten".