20506654 has 32 divisors (see below), whose sum is σ = 37091520. Its totient is φ = 8316672.

The previous prime is 20506637. The next prime is 20506669. The reversal of 20506654 is 45660502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21042 + ... + 21994.

It is an arithmetic number, because the mean of its divisors is an integer number (1159110).

Almost surely, 2^20506654 is an apocalyptic number.

20506654 is a deficient number, since it is larger than the sum of its proper divisors (16584866).

20506654 is a wasteful number, since it uses less digits than its factorization.

20506654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 20506654 is about 4528.4273208256. The cubic root of 20506654 is about 273.7147919385.

It can be divided in two parts, 205066 and 54, that added together give a triangular number (205120 = T₆₄₀).

The spelling of 20506654 in words is "twenty million, five hundred six thousand, six hundred fifty-four".