20146889542 has 16 divisors (see below), whose sum is σ = 32724789552. Its totient is φ = 9247188960.

The previous prime is 20146889513. The next prime is 20146889563. The reversal of 20146889542 is 24598864102.

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, 2135848 + ... + 2145259.

It is an arithmetic number, because the mean of its divisors is an integer number (2045299347).

Almost surely, 2^20146889542 is an apocalyptic number.

20146889542 is a deficient number, since it is larger than the sum of its proper divisors (12577900010).

20146889542 is a wasteful number, since it uses less digits than its factorization.

20146889542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4281303.

The product of its (nonzero) digits is 1105920, while the sum is 49.

The spelling of 20146889542 in words is "twenty billion, one hundred forty-six million, eight hundred eighty-nine thousand, five hundred forty-two".