21343950 has 36 divisors (see below), whose sum is σ = 57345288. Its totient is φ = 5691600.

The previous prime is 21343943. The next prime is 21343951. The reversal of 21343950 is 5934312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21343951) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 23266 + ... + 24165.

Almost surely, 2^21343950 is an apocalyptic number.

21343950 is an abundant number, since it is smaller than the sum of its proper divisors (36001338).

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

21343950 is a wasteful number, since it uses less digits than its factorization.

21343950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47449 (or 47441 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 21343950 is about 4619.9512984446. The cubic root of 21343950 is about 277.3905095200.

It can be divided in two parts, 2134 and 3950, that added together give a square (6084 = 78²).

The spelling of 21343950 in words is "twenty-one million, three hundred forty-three thousand, nine hundred fifty".