20705062155 has 8 divisors (see below), whose sum is σ = 33128099472. Its totient is φ = 11042699808.

The previous prime is 20705062117. The next prime is 20705062159. The reversal of 20705062155 is 55126050702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20705062155 - 2⁸ = 20705061899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20705062159) 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, 690168724 + ... + 690168753.

It is an arithmetic number, because the mean of its divisors is an integer number (4141012434).

Almost surely, 2^20705062155 is an apocalyptic number.

20705062155 is a deficient number, since it is larger than the sum of its proper divisors (12423037317).

20705062155 is a wasteful number, since it uses less digits than its factorization.

20705062155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380337485.

The product of its (nonzero) digits is 21000, while the sum is 33.

The spelling of 20705062155 in words is "twenty billion, seven hundred five million, sixty-two thousand, one hundred fifty-five".