20154321355 has 32 divisors (see below), whose sum is σ = 29307432960. Its totient is φ = 12988792320.

The previous prime is 20154321347. The next prime is 20154321401. The reversal of 20154321355 is 55312345102.

It is not a de Polignac number, because 20154321355 - 2³ = 20154321347 is a prime.

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, 404250 + ... + 451360.

It is an arithmetic number, because the mean of its divisors is an integer number (915857280).

Almost surely, 2^20154321355 is an apocalyptic number.

20154321355 is a deficient number, since it is larger than the sum of its proper divisors (9153111605).

20154321355 is a wasteful number, since it uses less digits than its factorization.

20154321355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47859.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 20154321355 its reverse (55312345102), we get a palindrome (75466666457).

The spelling of 20154321355 in words is "twenty billion, one hundred fifty-four million, three hundred twenty-one thousand, three hundred fifty-five".