20154423423460 has 48 divisors (see below), whose sum is σ = 43890210314496. Its totient is φ = 7767729470592.

The previous prime is 20154423423457. The next prime is 20154423423461. The reversal of 20154423423460 is 6432432445102.

It is a super-2 number, since 2×20154423423460² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20154423423461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132135952 + ... + 132288391.

It is an arithmetic number, because the mean of its divisors is an integer number (914379381552).

Almost surely, 2^{20154423423460} is an apocalyptic number.

20154423423460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20154423423460 is an abundant number, since it is smaller than the sum of its proper divisors (23735786891036).

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

20154423423460 is a wasteful number, since it uses less digits than its factorization.

20154423423460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264424492 (or 264424490 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 40.

Adding to 20154423423460 its reverse (6432432445102), we get a palindrome (26586855868562).

The spelling of 20154423423460 in words is "twenty trillion, one hundred fifty-four billion, four hundred twenty-three million, four hundred twenty-three thousand, four hundred sixty".