20665231454 has 32 divisors (see below), whose sum is σ = 36332271360. Its totient is φ = 8630923392.

The previous prime is 20665231427. The next prime is 20665231463. The reversal of 20665231454 is 45413256602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 227942 + ... + 305430.

It is an arithmetic number, because the mean of its divisors is an integer number (1135383480).

Almost surely, 2^20665231454 is an apocalyptic number.

20665231454 is a deficient number, since it is larger than the sum of its proper divisors (15667039906).

20665231454 is a wasteful number, since it uses less digits than its factorization.

20665231454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77984.

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 20665231454 in words is "twenty billion, six hundred sixty-five million, two hundred thirty-one thousand, four hundred fifty-four".