20154423553 has 8 divisors (see below), whose sum is σ = 22029845760. Its totient is φ = 18286201680.

The previous prime is 20154423539. The next prime is 20154423571. The reversal of 20154423553 is 35532445102.

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

It is a cyclic number.

It is not a de Polignac number, because 20154423553 - 2⁵ = 20154423521 is a prime.

It is a super-2 number, since 2×20154423553² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20154423053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1794225 + ... + 1805422.

It is an arithmetic number, because the mean of its divisors is an integer number (2753730720).

Almost surely, 2^20154423553 is an apocalyptic number.

It is an amenable number.

20154423553 is a deficient number, since it is larger than the sum of its proper divisors (1875422207).

20154423553 is a wasteful number, since it uses less digits than its factorization.

20154423553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3600167.

The product of its (nonzero) digits is 72000, while the sum is 34.

Adding to 20154423553 its reverse (35532445102), we get a palindrome (55686868655).

The spelling of 20154423553 in words is "twenty billion, one hundred fifty-four million, four hundred twenty-three thousand, five hundred fifty-three".