20100949 has 8 divisors (see below), whose sum is σ = 21973248. Its totient is φ = 18236160.

The previous prime is 20100943. The next prime is 20100991. The reversal of 20100949 is 94900102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20100949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4764 + ... + 7930.

It is an arithmetic number, because the mean of its divisors is an integer number (2746656).

Almost surely, 2^20100949 is an apocalyptic number.

It is an amenable number.

20100949 is a deficient number, since it is larger than the sum of its proper divisors (1872299).

20100949 is a wasteful number, since it uses less digits than its factorization.

20100949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3755.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 20100949 is about 4483.4081902053. The cubic root of 20100949 is about 271.8976916631.

The spelling of 20100949 in words is "twenty million, one hundred thousand, nine hundred forty-nine".