20154131534 has 16 divisors (see below), whose sum is σ = 30338527968. Its totient is φ = 10041314592.

The previous prime is 20154131527. The next prime is 20154131581. The reversal of 20154131534 is 43513145102.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20154131497 and 20154131506.

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, 2231612 + ... + 2240624.

It is an arithmetic number, because the mean of its divisors is an integer number (1896157998).

Almost surely, 2^20154131534 is an apocalyptic number.

20154131534 is a deficient number, since it is larger than the sum of its proper divisors (10184396434).

20154131534 is a wasteful number, since it uses less digits than its factorization.

20154131534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12859.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 20154131534 its reverse (43513145102), we get a palindrome (63667276636).

The spelling of 20154131534 in words is "twenty billion, one hundred fifty-four million, one hundred thirty-one thousand, five hundred thirty-four".