20145430131 has 16 divisors (see below), whose sum is σ = 27574247424. Its totient is φ = 13076411904.

The previous prime is 20145430127. The next prime is 20145430147. The reversal of 20145430131 is 13103454102.

It is a happy number.

It is not a de Polignac number, because 20145430131 - 2² = 20145430127 is a prime.

It is a super-2 number, since 2×20145430131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20145430111) 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, 342931 + ... + 397356.

It is an arithmetic number, because the mean of its divisors is an integer number (1723390464).

Almost surely, 2^20145430131 is an apocalyptic number.

20145430131 is a deficient number, since it is larger than the sum of its proper divisors (7428817293).

20145430131 is a wasteful number, since it uses less digits than its factorization.

20145430131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740530.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 20145430131 its reverse (13103454102), we get a palindrome (33248884233).

The spelling of 20145430131 in words is "twenty billion, one hundred forty-five million, four hundred thirty thousand, one hundred thirty-one".