20153143464 has 32 divisors (see below), whose sum is σ = 50593680000. Its totient is φ = 6689604992.

The previous prime is 20153143457. The next prime is 20153143487. The reversal of 20153143464 is 46434135102.

It is a happy number.

It is a super-2 number, since 2×20153143464² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1750989 + ... + 1762460.

It is an arithmetic number, because the mean of its divisors is an integer number (1581052500).

Almost surely, 2^20153143464 is an apocalyptic number.

20153143464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20153143464 is an abundant number, since it is smaller than the sum of its proper divisors (30440536536).

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

20153143464 is a wasteful number, since it uses less digits than its factorization.

20153143464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3513697 (or 3513693 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 20153143464 its reverse (46434135102), we get a palindrome (66587278566).

The spelling of 20153143464 in words is "twenty billion, one hundred fifty-three million, one hundred forty-three thousand, four hundred sixty-four".