20354621378 has 32 divisors (see below), whose sum is σ = 39555546240. Its totient is φ = 7628567040.

The previous prime is 20354621369. The next prime is 20354621429. The reversal of 20354621378 is 87312645302.

It is a super-2 number, since 2×20354621378² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

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, 2939663 + ... + 2946578.

It is an arithmetic number, because the mean of its divisors is an integer number (1236110820).

Almost surely, 2^20354621378 is an apocalyptic number.

20354621378 is a deficient number, since it is larger than the sum of its proper divisors (19200924862).

20354621378 is a wasteful number, since it uses less digits than its factorization.

20354621378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5886282.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 20354621378 in words is "twenty billion, three hundred fifty-four million, six hundred twenty-one thousand, three hundred seventy-eight".