19906956 has 18 divisors (see below), whose sum is σ = 50320452. Its totient is φ = 6635640.

The previous prime is 19906951. The next prime is 19906961. The reversal of 19906956 is 65960991.

It is an interprime number because it is at equal distance from previous prime (19906951) and next prime (19906961).

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (19906951) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 276450 + ... + 276521.

Almost surely, 2^19906956 is an apocalyptic number.

It is an amenable number.

19906956 is an abundant number, since it is smaller than the sum of its proper divisors (30413496).

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

19906956 is a wasteful number, since it uses less digits than its factorization.

19906956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552981 (or 552976 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 19906956 is about 4461.7211925444. The cubic root of 19906956 is about 271.0201734232.

The spelling of 19906956 in words is "nineteen million, nine hundred six thousand, nine hundred fifty-six".