20154154102 has 4 divisors (see below), whose sum is σ = 30231231156. Its totient is φ = 10077077050.

The previous prime is 20154154091. The next prime is 20154154103. The reversal of 20154154102 is 20145145102.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20154154103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5038538524 + ... + 5038538527.

It is an arithmetic number, because the mean of its divisors is an integer number (7557807789).

Almost surely, 2^20154154102 is an apocalyptic number.

20154154102 is a deficient number, since it is larger than the sum of its proper divisors (10077077054).

20154154102 is a wasteful number, since it uses less digits than its factorization.

20154154102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10077077053.

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 20154154102 its reverse (20145145102), we get a palindrome (40299299204).

The spelling of 20154154102 in words is "twenty billion, one hundred fifty-four million, one hundred fifty-four thousand, one hundred two".