21320620350 has 48 divisors (see below), whose sum is σ = 52898267568. Its totient is φ = 5683011840.

The previous prime is 21320620333. The next prime is 21320620361. The reversal of 21320620350 is 5302602312.

It is a self number, because there is not a number n which added to its sum of digits gives 21320620350.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 326652 + ... + 386448.

It is an arithmetic number, because the mean of its divisors is an integer number (1102047241).

Almost surely, 2^21320620350 is an apocalyptic number.

21320620350 is an abundant number, since it is smaller than the sum of its proper divisors (31577647218).

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

21320620350 is a wasteful number, since it uses less digits than its factorization.

21320620350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62189 (or 62184 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The spelling of 21320620350 in words is "twenty-one billion, three hundred twenty million, six hundred twenty thousand, three hundred fifty".