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22019421 = 311176571
BaseRepresentation
bin101001111111…
…1110101011101
31112102200222010
41103333311131
521114110141
62103541433
7355106364
oct123776535
945380863
1022019421
111147a576
12745a879
13473c658
142cd27db
151dee416
hex14ffd5d

22019421 has 8 divisors (see below), whose sum is σ = 29389984. Its totient is φ = 14664240.

The previous prime is 22019411. The next prime is 22019429. The reversal of 22019421 is 12491022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22019421 - 26 = 22019357 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 (22019429) 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, 66 + ... + 6636.

It is an arithmetic number, because the mean of its divisors is an integer number (3673748).

Almost surely, 222019421 is an apocalyptic number.

It is an amenable number.

22019421 is a deficient number, since it is larger than the sum of its proper divisors (7370563).

22019421 is a wasteful number, since it uses less digits than its factorization.

22019421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7691.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 22019421 is about 4692.4855886833. The cubic root of 22019421 is about 280.2863609453.

The spelling of 22019421 in words is "twenty-two million, nineteen thousand, four hundred twenty-one".

Divisors: 1 3 1117 3351 6571 19713 7339807 22019421