20455755 has 8 divisors (see below), whose sum is σ = 32729232. Its totient is φ = 10909728.

The previous prime is 20455711. The next prime is 20455823. The reversal of 20455755 is 55755402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20455755 - 2⁷ = 20455627 is a prime.

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, 681844 + ... + 681873.

It is an arithmetic number, because the mean of its divisors is an integer number (4091154).

Almost surely, 2^20455755 is an apocalyptic number.

20455755 is a deficient number, since it is larger than the sum of its proper divisors (12273477).

20455755 is a wasteful number, since it uses less digits than its factorization.

20455755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363725.

The product of its (nonzero) digits is 35000, while the sum is 33.

The square root of 20455755 is about 4522.8038869710. The cubic root of 20455755 is about 273.4881443391.

The spelling of 20455755 in words is "twenty million, four hundred fifty-five thousand, seven hundred fifty-five".