20354312511554 has 64 divisors (see below), whose sum is σ = 37834631331840. Its totient is φ = 8020151979840.

The previous prime is 20354312511541. The next prime is 20354312511571. The reversal of 20354312511554 is 45511521345302.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2804912 + ... + 6969659.

It is an arithmetic number, because the mean of its divisors is an integer number (591166114560).

Almost surely, 2^{20354312511554} is an apocalyptic number.

20354312511554 is a deficient number, since it is larger than the sum of its proper divisors (17480318820286).

20354312511554 is a wasteful number, since it uses less digits than its factorization.

20354312511554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9774855.

The product of its (nonzero) digits is 360000, while the sum is 41.

Adding to 20354312511554 its reverse (45511521345302), we get a palindrome (65865833856856).

The spelling of 20354312511554 in words is "twenty trillion, three hundred fifty-four billion, three hundred twelve million, five hundred eleven thousand, five hundred fifty-four".