20154256042 has 16 divisors (see below), whose sum is σ = 31825740960. Its totient is φ = 9545783472.

The previous prime is 20154256033. The next prime is 20154256079. The reversal of 20154256042 is 24065245102.

It is a junction number, because it is equal to n+sod(n) for n = 20154255995 and 20154256013.

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, 472533 + ... + 513415.

It is an arithmetic number, because the mean of its divisors is an integer number (1989108810).

Almost surely, 2^20154256042 is an apocalyptic number.

20154256042 is a deficient number, since it is larger than the sum of its proper divisors (11671484918).

20154256042 is a wasteful number, since it uses less digits than its factorization.

20154256042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53877.

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 20154256042 in words is "twenty billion, one hundred fifty-four million, two hundred fifty-six thousand, forty-two".