19955950 has 96 divisors (see below), whose sum is σ = 46139904. Its totient is φ = 6272640.

The previous prime is 19955933. The next prime is 19955951. The reversal of 19955950 is 5955991.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 19955897 and 19955906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19955951) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 297817 + ... + 297883.

It is an arithmetic number, because the mean of its divisors is an integer number (480624).

Almost surely, 2^19955950 is an apocalyptic number.

19955950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19955950 is an abundant number, since it is smaller than the sum of its proper divisors (26183954).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19955950 is a wasteful number, since it uses less digits than its factorization.

19955950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 91125, while the sum is 43.

The square root of 19955950 is about 4467.2083004937. The cubic root of 19955950 is about 271.2423316796.

The spelling of 19955950 in words is "nineteen million, nine hundred fifty-five thousand, nine hundred fifty".