220921057554 has 8 divisors (see below), whose sum is σ = 441842115120. Its totient is φ = 73640352516.

The previous prime is 220921057531. The next prime is 220921057583. The reversal of 220921057554 is 455750129022.

It is a sphenic number, since it is the product of 3 distinct primes.

220921057554 is an admirable number.

It is a super-2 number, since 2×220921057554² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18410088124 + ... + 18410088135.

It is an arithmetic number, because the mean of its divisors is an integer number (55230264390).

Almost surely, 2^220921057554 is an apocalyptic number.

220921057554 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

220921057554 is a wasteful number, since it uses less digits than its factorization.

220921057554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36820176264.

The product of its (nonzero) digits is 252000, while the sum is 42.

The spelling of 220921057554 in words is "two hundred twenty billion, nine hundred twenty-one million, fifty-seven thousand, five hundred fifty-four".