21460722 has 16 divisors (see below), whose sum is σ = 42968640. Its totient is φ = 7145712.

The previous prime is 21460697. The next prime is 21460723. The reversal of 21460722 is 22706412.

It is a super-2 number, since 2×21460722² = 921125177522568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21460692 and 21460701.

It is not an unprimeable number, because it can be changed into a prime (21460723) 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, 7323 + ... + 9825.

It is an arithmetic number, because the mean of its divisors is an integer number (2685540).

Almost surely, 2^21460722 is an apocalyptic number.

21460722 is an abundant number, since it is smaller than the sum of its proper divisors (21507918).

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

21460722 is a wasteful number, since it uses less digits than its factorization.

21460722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3937.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 21460722 is about 4632.5718558917. The cubic root of 21460722 is about 277.8954543661.

The spelling of 21460722 in words is "twenty-one million, four hundred sixty thousand, seven hundred twenty-two".