21954960 has 60 divisors (see below), whose sum is σ = 73734492. Its totient is φ = 5854464.

The previous prime is 21954953. The next prime is 21954971. The reversal of 21954960 is 6945912.

It can be written as a sum of positive squares in 2 ways, for example, as 4112784 + 17842176 = 2028^2 + 4224^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 14527 + ... + 15966.

Almost surely, 2^21954960 is an apocalyptic number.

21954960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21954960 is an abundant number, since it is smaller than the sum of its proper divisors (51779532).

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

21954960 is a wasteful number, since it uses less digits than its factorization.

21954960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30512 (or 30503 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 21954960 is about 4685.6120197899. The cubic root of 21954960 is about 280.0125844684.

The spelling of 21954960 in words is "twenty-one million, nine hundred fifty-four thousand, nine hundred sixty".