20914555 has 16 divisors (see below), whose sum is σ = 25993440. Its totient is φ = 16144128.

The previous prime is 20914547. The next prime is 20914559. The reversal of 20914555 is 55541902.

It is a cyclic number.

It is not a de Polignac number, because 20914555 - 2³ = 20914547 is a prime.

It is a super-2 number, since 2×20914555² = 874837221696050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20914559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18589 + ... + 19681.

It is an arithmetic number, because the mean of its divisors is an integer number (1624590).

Almost surely, 2^20914555 is an apocalyptic number.

20914555 is a deficient number, since it is larger than the sum of its proper divisors (5078885).

20914555 is a wasteful number, since it uses less digits than its factorization.

20914555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 20914555 is about 4573.2433786100. The cubic root of 20914555 is about 275.5177244271.

The spelling of 20914555 in words is "twenty million, nine hundred fourteen thousand, five hundred fifty-five".