20897446 has 16 divisors (see below), whose sum is σ = 32029200. Its totient is φ = 10222848.

The previous prime is 20897431. The next prime is 20897477. The reversal of 20897446 is 64479802.

It is a junction number, because it is equal to n+sod(n) for n = 20897399 and 20897408.

It is a congruent number.

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, 48046 + ... + 48478.

It is an arithmetic number, because the mean of its divisors is an integer number (2001825).

Almost surely, 2^20897446 is an apocalyptic number.

20897446 is a deficient number, since it is larger than the sum of its proper divisors (11131754).

20897446 is a wasteful number, since it uses less digits than its factorization.

20897446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 20897446 is about 4571.3724416197. The cubic root of 20897446 is about 275.4425755064.

The spelling of 20897446 in words is "twenty million, eight hundred ninety-seven thousand, four hundred forty-six".