19972950 has 24 divisors (see below), whose sum is σ = 49533288. Its totient is φ = 5326080.

The previous prime is 19972949. The next prime is 19972951. The reversal of 19972950 is 5927991.

It is an interprime number because it is at equal distance from previous prime (19972949) and next prime (19972951).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19972951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66427 + ... + 66726.

It is an arithmetic number, because the mean of its divisors is an integer number (2063887).

Almost surely, 2^19972950 is an apocalyptic number.

19972950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19972950 is an abundant number, since it is smaller than the sum of its proper divisors (29560338).

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

19972950 is a wasteful number, since it uses less digits than its factorization.

19972950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133168 (or 133163 counting only the distinct ones).

The product of its (nonzero) digits is 51030, while the sum is 42.

The square root of 19972950 is about 4469.1106497826. The cubic root of 19972950 is about 271.3193314531.

The spelling of 19972950 in words is "nineteen million, nine hundred seventy-two thousand, nine hundred fifty".