19912950 has 144 divisors (see below), whose sum is σ = 60063120. Its totient is φ = 4700160.

The previous prime is 19912939. The next prime is 19912951. The reversal of 19912950 is 5921991.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19912951) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 145282 + ... + 145418.

It is an arithmetic number, because the mean of its divisors is an integer number (417105).

Almost surely, 2^19912950 is an apocalyptic number.

19912950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19912950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30031560).

19912950 is an abundant number, since it is smaller than the sum of its proper divisors (40150170).

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

19912950 is a wasteful number, since it uses less digits than its factorization.

19912950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 36.

The square root of 19912950 is about 4462.3928558566. The cubic root of 19912950 is about 271.0473721555.

The spelling of 19912950 in words is "nineteen million, nine hundred twelve thousand, nine hundred fifty".