20355404654 has 16 divisors (see below), whose sum is σ = 32902964640. Its totient is φ = 9388757280.

The previous prime is 20355404647. The next prime is 20355404723. The reversal of 20355404654 is 45640455302.

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, 210557 + ... + 291624.

It is an arithmetic number, because the mean of its divisors is an integer number (2056435290).

Almost surely, 2^20355404654 is an apocalyptic number.

20355404654 is a deficient number, since it is larger than the sum of its proper divisors (12547559986).

20355404654 is a wasteful number, since it uses less digits than its factorization.

20355404654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503755.

The product of its (nonzero) digits is 288000, while the sum is 38.

Adding to 20355404654 its reverse (45640455302), we get a palindrome (65995859956).

The spelling of 20355404654 in words is "twenty billion, three hundred fifty-five million, four hundred four thousand, six hundred fifty-four".