20031502042155 has 8 divisors (see below), whose sum is σ = 32050403267472. Its totient is φ = 10683467755808.

The previous prime is 20031502042147. The next prime is 20031502042159. The reversal of 20031502042155 is 55124020513002.

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

It is a cyclic number.

It is not a de Polignac number, because 20031502042155 - 2³ = 20031502042147 is a prime.

It is a super-2 number, since 2×20031502042155² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20031502042159) 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, 667716734724 + ... + 667716734753.

It is an arithmetic number, because the mean of its divisors is an integer number (4006300408434).

Almost surely, 2^{20031502042155} is an apocalyptic number.

20031502042155 is a deficient number, since it is larger than the sum of its proper divisors (12018901225317).

20031502042155 is a wasteful number, since it uses less digits than its factorization.

20031502042155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335433469485.

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 20031502042155 its reverse (55124020513002), we get a palindrome (75155522555157).

The spelling of 20031502042155 in words is "twenty trillion, thirty-one billion, five hundred two million, forty-two thousand, one hundred fifty-five".