20447464 has 32 divisors (see below), whose sum is σ = 40824000. Its totient is φ = 9568000.

The previous prime is 20447443. The next prime is 20447467. The reversal of 20447464 is 46474402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20447467) 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, 33837 + ... + 34435.

It is an arithmetic number, because the mean of its divisors is an integer number (1275750).

Almost surely, 2^20447464 is an apocalyptic number.

It is an amenable number.

20447464 is a deficient number, since it is larger than the sum of its proper divisors (20376536).

20447464 is a wasteful number, since it uses less digits than its factorization.

20447464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873 (or 869 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 31.

The square root of 20447464 is about 4521.8872166386. The cubic root of 20447464 is about 273.4511898387.

The spelling of 20447464 in words is "twenty million, four hundred forty-seven thousand, four hundred sixty-four".