19422870 has 16 divisors (see below), whose sum is σ = 46614960. Its totient is φ = 5179424.

The previous prime is 19422869. The next prime is 19422877. The reversal of 19422870 is 7822491.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19422877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323685 + ... + 323744.

It is an arithmetic number, because the mean of its divisors is an integer number (2913435).

Almost surely, 2^19422870 is an apocalyptic number.

19422870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19422870 is an abundant number, since it is smaller than the sum of its proper divisors (27192090).

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

19422870 is a wasteful number, since it uses less digits than its factorization.

19422870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647439.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 19422870 is about 4407.1385274348. The cubic root of 19422870 is about 268.8052837414.

The spelling of 19422870 in words is "nineteen million, four hundred twenty-two thousand, eight hundred seventy".