20402103254 has 16 divisors (see below), whose sum is σ = 33047060928. Its totient is φ = 9390693312.

The previous prime is 20402103221. The next prime is 20402103277. The reversal of 20402103254 is 45230120402.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1059527 + ... + 1078610.

It is an arithmetic number, because the mean of its divisors is an integer number (2065441308).

Almost surely, 2^20402103254 is an apocalyptic number.

20402103254 is a deficient number, since it is larger than the sum of its proper divisors (12644957674).

20402103254 is a wasteful number, since it uses less digits than its factorization.

20402103254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2138519.

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 20402103254 its reverse (45230120402), we get a palindrome (65632223656).

The spelling of 20402103254 in words is "twenty billion, four hundred two million, one hundred three thousand, two hundred fifty-four".