20534456 has 8 divisors (see below), whose sum is σ = 38502120. Its totient is φ = 10267224.

The previous prime is 20534443. The next prime is 20534461. The reversal of 20534456 is 65443502.

It is a tau number, because it is divible by the number of its divisors (8).

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, 1283396 + ... + 1283411.

It is an arithmetic number, because the mean of its divisors is an integer number (4812765).

Almost surely, 2^20534456 is an apocalyptic number.

It is an amenable number.

20534456 is a deficient number, since it is larger than the sum of its proper divisors (17967664).

20534456 is a wasteful number, since it uses less digits than its factorization.

20534456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2566813 (or 2566809 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 20534456 is about 4531.4960002189. The cubic root of 20534456 is about 273.8384328182.

Adding to 20534456 its reverse (65443502), we get a palindrome (85977958).

The spelling of 20534456 in words is "twenty million, five hundred thirty-four thousand, four hundred fifty-six".