20865454 has 4 divisors (see below), whose sum is σ = 31298184. Its totient is φ = 10432726.

The previous prime is 20865391. The next prime is 20865461. The reversal of 20865454 is 45456802.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×20865454² = 870734341252232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5216362 + ... + 5216365.

It is an arithmetic number, because the mean of its divisors is an integer number (7824546).

Almost surely, 2^20865454 is an apocalyptic number.

20865454 is a deficient number, since it is larger than the sum of its proper divisors (10432730).

20865454 is a wasteful number, since it uses less digits than its factorization.

20865454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10432729.

The product of its (nonzero) digits is 38400, while the sum is 34.

The square root of 20865454 is about 4567.8719334062. The cubic root of 20865454 is about 275.3019449327.

The spelling of 20865454 in words is "twenty million, eight hundred sixty-five thousand, four hundred fifty-four".