21950898 has 16 divisors (see below), whose sum is σ = 44923296. Its totient is φ = 7146720.

The previous prime is 21950897. The next prime is 21950899. The reversal of 21950898 is 89805912.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21950897) and next prime (21950899).

It is not an unprimeable number, because it can be changed into a prime (21950897) 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, 42283 + ... + 42798.

It is an arithmetic number, because the mean of its divisors is an integer number (2807706).

Almost surely, 2^21950898 is an apocalyptic number.

21950898 is an abundant number, since it is smaller than the sum of its proper divisors (22972398).

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

21950898 is a wasteful number, since it uses less digits than its factorization.

21950898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85129.

The product of its (nonzero) digits is 51840, while the sum is 42.

The square root of 21950898 is about 4685.1785451571. The cubic root of 21950898 is about 279.9953145474.

The spelling of 21950898 in words is "twenty-one million, nine hundred fifty thousand, eight hundred ninety-eight".