20671464 has 32 divisors (see below), whose sum is σ = 56377440. Its totient is φ = 6264000.

The previous prime is 20671423. The next prime is 20671471. The reversal of 20671464 is 46417602.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38887 + ... + 39414.

It is an arithmetic number, because the mean of its divisors is an integer number (1761795).

Almost surely, 2^20671464 is an apocalyptic number.

20671464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20671464 is an abundant number, since it is smaller than the sum of its proper divisors (35705976).

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

20671464 is a wasteful number, since it uses less digits than its factorization.

20671464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78321 (or 78317 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 20671464 is about 4546.5881713654. The cubic root of 20671464 is about 274.4461093739.

The spelling of 20671464 in words is "twenty million, six hundred seventy-one thousand, four hundred sixty-four".