20155654646 has 16 divisors (see below), whose sum is σ = 31300622640. Its totient is φ = 9722660640.

The previous prime is 20155654643. The next prime is 20155654657. The reversal of 20155654646 is 64645655102.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20155654597 and 20155654606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20155654643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62000 + ... + 210131.

It is an arithmetic number, because the mean of its divisors is an integer number (1956288915).

Almost surely, 2^20155654646 is an apocalyptic number.

20155654646 is a deficient number, since it is larger than the sum of its proper divisors (11144967994).

20155654646 is a wasteful number, since it uses less digits than its factorization.

20155654646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273439.

The product of its (nonzero) digits is 864000, while the sum is 44.

The spelling of 20155654646 in words is "twenty billion, one hundred fifty-five million, six hundred fifty-four thousand, six hundred forty-six".