20211333402309 has 32 divisors (see below), whose sum is σ = 30914084553984. Its totient is φ = 11505901693440.

The previous prime is 20211333402307. The next prime is 20211333402313. The reversal of 20211333402309 is 90320433311202.

It is not a de Polignac number, because 20211333402309 - 2¹ = 20211333402307 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20211333402309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211333402307) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29001307 + ... + 29690039.

It is an arithmetic number, because the mean of its divisors is an integer number (966065142312).

Almost surely, 2^{20211333402309} is an apocalyptic number.

It is an amenable number.

20211333402309 is a deficient number, since it is larger than the sum of its proper divisors (10702751151675).

20211333402309 is a wasteful number, since it uses less digits than its factorization.

20211333402309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693997.

The product of its (nonzero) digits is 23328, while the sum is 33.

The spelling of 20211333402309 in words is "twenty trillion, two hundred eleven billion, three hundred thirty-three million, four hundred two thousand, three hundred nine".