20855880354 has 32 divisors (see below), whose sum is σ = 44221026816. Its totient is φ = 6545871360.

The previous prime is 20855880329. The next prime is 20855880359. The reversal of 20855880354 is 45308855802.

It is not an unprimeable number, because it can be changed into a prime (20855880359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1508367 + ... + 1522130.

It is an arithmetic number, because the mean of its divisors is an integer number (1381907088).

Almost surely, 2^20855880354 is an apocalyptic number.

20855880354 is an abundant number, since it is smaller than the sum of its proper divisors (23365146462).

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

20855880354 is a wasteful number, since it uses less digits than its factorization.

20855880354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030570.

The product of its (nonzero) digits is 1536000, while the sum is 48.

The spelling of 20855880354 in words is "twenty billion, eight hundred fifty-five million, eight hundred eighty thousand, three hundred fifty-four".