20111265354 has 16 divisors (see below), whose sum is σ = 40224222720. Its totient is φ = 6703473120.

The previous prime is 20111265323. The next prime is 20111265359. The reversal of 20111265354 is 45356211102.

It is not an unprimeable number, because it can be changed into a prime (20111265359) 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, 126262 + ... + 236990.

It is an arithmetic number, because the mean of its divisors is an integer number (2514013920).

Almost surely, 2^20111265354 is an apocalyptic number.

20111265354 is an abundant number, since it is smaller than the sum of its proper divisors (20112957366).

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

20111265354 is a wasteful number, since it uses less digits than its factorization.

20111265354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141005.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 20111265354 its reverse (45356211102), we get a palindrome (65467476456).

The spelling of 20111265354 in words is "twenty billion, one hundred eleven million, two hundred sixty-five thousand, three hundred fifty-four".