21403693350 has 72 divisors (see below), whose sum is σ = 61928036352. Its totient is φ = 5268600000.

The previous prime is 21403693321. The next prime is 21403693369. The reversal of 21403693350 is 5339630412.

It is a happy number.

21403693350 is a `hidden beast` number, since 214 + 0 + 3 + 6 + 93 + 350 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1823526 + ... + 1835225.

It is an arithmetic number, because the mean of its divisors is an integer number (860111616).

Almost surely, 2^21403693350 is an apocalyptic number.

21403693350 is an abundant number, since it is smaller than the sum of its proper divisors (40524343002).

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

21403693350 is a wasteful number, since it uses less digits than its factorization.

21403693350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3658782 (or 3658774 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The spelling of 21403693350 in words is "twenty-one billion, four hundred three million, six hundred ninety-three thousand, three hundred fifty".