19951960 has 32 divisors (see below), whose sum is σ = 51305760. Its totient is φ = 6840576.

The previous prime is 19951909. The next prime is 19951961. The reversal of 19951960 is 6915991.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19951961) 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, 35349 + ... + 35908.

It is an arithmetic number, because the mean of its divisors is an integer number (1603305).

Almost surely, 2^19951960 is an apocalyptic number.

19951960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19951960 is an abundant number, since it is smaller than the sum of its proper divisors (31353800).

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

19951960 is a wasteful number, since it uses less digits than its factorization.

19951960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71275 (or 71271 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 40.

The square root of 19951960 is about 4466.7616905315. The cubic root of 19951960 is about 271.2242530440.

The spelling of 19951960 in words is "nineteen million, nine hundred fifty-one thousand, nine hundred sixty".