21399614898 has 32 divisors (see below), whose sum is σ = 44267876352. Its totient is φ = 6889347600.

The previous prime is 21399614869. The next prime is 21399614911. The reversal of 21399614898 is 89841699312.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20808 + ... + 207923.

It is an arithmetic number, because the mean of its divisors is an integer number (1383371136).

Almost surely, 2^21399614898 is an apocalyptic number.

21399614898 is an abundant number, since it is smaller than the sum of its proper divisors (22868261454).

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

21399614898 is a wasteful number, since it uses less digits than its factorization.

21399614898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229270.

The product of its digits is 6718464, while the sum is 60.

The spelling of 21399614898 in words is "twenty-one billion, three hundred ninety-nine million, six hundred fourteen thousand, eight hundred ninety-eight".