20153143465 has 32 divisors (see below), whose sum is σ = 30456873216. Its totient is φ = 12459605760.

The previous prime is 20153143457. The next prime is 20153143487. The reversal of 20153143465 is 56434135102.

It is not a de Polignac number, because 20153143465 - 2³ = 20153143457 is a prime.

It is a super-2 number, since 2×20153143465² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 20153143465.

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, 495466 + ... + 534595.

It is an arithmetic number, because the mean of its divisors is an integer number (951777288).

Almost surely, 2^20153143465 is an apocalyptic number.

It is an amenable number.

20153143465 is a deficient number, since it is larger than the sum of its proper divisors (10303729751).

20153143465 is a wasteful number, since it uses less digits than its factorization.

20153143465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030129.

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 20153143465 its reverse (56434135102), we get a palindrome (76587278567).

The spelling of 20153143465 in words is "twenty billion, one hundred fifty-three million, one hundred forty-three thousand, four hundred sixty-five".