20466340 has 12 divisors (see below), whose sum is σ = 42979356. Its totient is φ = 8186528.

The previous prime is 20466331. The next prime is 20466349. The reversal of 20466340 is 4366402.

It is an interprime number because it is at equal distance from previous prime (20466331) and next prime (20466349).

It can be written as a sum of positive squares in 2 ways, for example, as 13778944 + 6687396 = 3712^2 + 2586^2 .

It is not an unprimeable number, because it can be changed into a prime (20466349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 511639 + ... + 511678.

It is an arithmetic number, because the mean of its divisors is an integer number (3581613).

Almost surely, 2^20466340 is an apocalyptic number.

20466340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20466340 is an abundant number, since it is smaller than the sum of its proper divisors (22513016).

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

20466340 is a wasteful number, since it uses less digits than its factorization.

20466340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023326 (or 1023324 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 20466340 is about 4523.9739168125. The cubic root of 20466340 is about 273.5353091073.

The spelling of 20466340 in words is "twenty million, four hundred sixty-six thousand, three hundred forty".