20144955 has 16 divisors (see below), whose sum is σ = 32553504. Its totient is φ = 10636800.

The previous prime is 20144951. The next prime is 20144963. The reversal of 20144955 is 55944102.

It is not a de Polignac number, because 20144955 - 2² = 20144951 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20144951) 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, 5134 + ... + 8163.

It is an arithmetic number, because the mean of its divisors is an integer number (2034594).

Almost surely, 2^20144955 is an apocalyptic number.

20144955 is a deficient number, since it is larger than the sum of its proper divisors (12408549).

20144955 is a wasteful number, since it uses less digits than its factorization.

20144955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13406.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 20144955 is about 4488.3131575237. The cubic root of 20144955 is about 272.0959643727.

The spelling of 20144955 in words is "twenty million, one hundred forty-four thousand, nine hundred fifty-five".