20616354654 has 16 divisors (see below), whose sum is σ = 47123096448. Its totient is φ = 5890387032.

The previous prime is 20616354653. The next prime is 20616354659. The reversal of 20616354654 is 45645361602.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 490865587 = 20616354654 / (2 + 0 + 6 + 1 + 6 + 3 + 5 + 4 + 6 + 5 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20616354653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245432752 + ... + 245432835.

It is an arithmetic number, because the mean of its divisors is an integer number (2945193528).

Almost surely, 2^20616354654 is an apocalyptic number.

20616354654 is an abundant number, since it is smaller than the sum of its proper divisors (26506741794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20616354654 is a wasteful number, since it uses less digits than its factorization.

20616354654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490865599.

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 20616354654 in words is "twenty billion, six hundred sixteen million, three hundred fifty-four thousand, six hundred fifty-four".