21020143130040 has 32 divisors (see below), whose sum is σ = 63060429390480. Its totient is φ = 5605371501312.

The previous prime is 21020143130039. The next prime is 21020143130137. The reversal of 21020143130040 is 4003134102012.

It is a junction number, because it is equal to n+sod(n) for n = 21020143129989 and 21020143130016.

It is a congruent number.

It is an unprimeable number.

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, 87583929589 + ... + 87583929828.

Almost surely, 2^{21020143130040} is an apocalyptic number.

21020143130040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21020143130040 is an abundant number, since it is smaller than the sum of its proper divisors (42040286260440).

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

21020143130040 is a wasteful number, since it uses less digits than its factorization.

21020143130040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175167859431 (or 175167859427 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21020143130040 its reverse (4003134102012), we get a palindrome (25023277232052).

The spelling of 21020143130040 in words is "twenty-one trillion, twenty billion, one hundred forty-three million, one hundred thirty thousand, forty".