206820153554 has 16 divisors (see below), whose sum is σ = 354582010176. Its totient is φ = 88628914800.

The previous prime is 206820153497. The next prime is 206820153563. The reversal of 206820153554 is 455351028602.

It is a super-2 number, since 2×206820153554² (a number of 23 digits) contains 22 as substring.

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, 534977 + ... + 836564.

It is an arithmetic number, because the mean of its divisors is an integer number (22161375636).

Almost surely, 2^206820153554 is an apocalyptic number.

206820153554 is a deficient number, since it is larger than the sum of its proper divisors (147761856622).

206820153554 is a wasteful number, since it uses less digits than its factorization.

206820153554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382321.

The product of its (nonzero) digits is 288000, while the sum is 41.

The spelling of 206820153554 in words is "two hundred six billion, eight hundred twenty million, one hundred fifty-three thousand, five hundred fifty-four".