20210455554 has 8 divisors (see below), whose sum is σ = 40420911120. Its totient is φ = 6736818516.

The previous prime is 20210455543. The next prime is 20210455589. The reversal of 20210455554 is 45555401202.

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

20210455554 is an admirable number.

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, 1684204624 + ... + 1684204635.

It is an arithmetic number, because the mean of its divisors is an integer number (5052613890).

Almost surely, 2^20210455554 is an apocalyptic number.

20210455554 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.

20210455554 is a wasteful number, since it uses less digits than its factorization.

20210455554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3368409264.

The product of its (nonzero) digits is 40000, while the sum is 33.

Adding to 20210455554 its reverse (45555401202), we get a palindrome (65765856756).

The spelling of 20210455554 in words is "twenty billion, two hundred ten million, four hundred fifty-five thousand, five hundred fifty-four".