20351996 has 24 divisors (see below), whose sum is σ = 42018816. Its totient is φ = 8440560.

The previous prime is 20351993. The next prime is 20352001. The reversal of 20351996 is 69915302.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20351993) 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, 10856 + ... + 12591.

It is an arithmetic number, because the mean of its divisors is an integer number (1750784).

Almost surely, 2^20351996 is an apocalyptic number.

It is an amenable number.

20351996 is an abundant number, since it is smaller than the sum of its proper divisors (21666820).

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

20351996 is a wasteful number, since it uses less digits than its factorization.

20351996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23489 (or 23487 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 20351996 is about 4511.3186542296. The cubic root of 20351996 is about 273.0249499754.

The spelling of 20351996 in words is "twenty million, three hundred fifty-one thousand, nine hundred ninety-six".