22154940 has 36 divisors (see below), whose sum is σ = 67203864. Its totient is φ = 5907936.

The previous prime is 22154939. The next prime is 22154963. The reversal of 22154940 is 4945122.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61362 + ... + 61721.

It is an arithmetic number, because the mean of its divisors is an integer number (1866774).

Almost surely, 2^22154940 is an apocalyptic number.

22154940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22154940 is an abundant number, since it is smaller than the sum of its proper divisors (45048924).

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

22154940 is a wasteful number, since it uses less digits than its factorization.

22154940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123098 (or 123093 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 22154940 is about 4706.9034406922. The cubic root of 22154940 is about 280.8601948045.

The spelling of 22154940 in words is "twenty-two million, one hundred fifty-four thousand, nine hundred forty".