20546431154355 has 32 divisors (see below), whose sum is σ = 34842433414464. Its totient is φ = 10303321419776.

The previous prime is 20546431154351. The next prime is 20546431154357. The reversal of 20546431154355 is 55345113464502.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20546431154355 - 2² = 20546431154351 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20546431154351) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39511794 + ... + 40028423.

It is an arithmetic number, because the mean of its divisors is an integer number (1088826044202).

Almost surely, 2^{20546431154355} is an apocalyptic number.

20546431154355 is a deficient number, since it is larger than the sum of its proper divisors (14296002260109).

20546431154355 is a wasteful number, since it uses less digits than its factorization.

20546431154355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79541255.

The product of its (nonzero) digits is 4320000, while the sum is 48.

The spelling of 20546431154355 in words is "twenty trillion, five hundred forty-six billion, four hundred thirty-one million, one hundred fifty-four thousand, three hundred fifty-five".