213806954040 has 64 divisors (see below), whose sum is σ = 643703600160. Its totient is φ = 56812277760.

The previous prime is 213806953991. The next prime is 213806954041. The reversal of 213806954040 is 40459608312.

It is a junction number, because it is equal to n+sod(n) for n = 213806953983 and 213806954001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213806954041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3136609 + ... + 3204048.

Almost surely, 2^213806954040 is an apocalyptic number.

213806954040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213806954040 is an abundant number, since it is smaller than the sum of its proper divisors (429896646120).

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

213806954040 is a wasteful number, since it uses less digits than its factorization.

213806954040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6340952 (or 6340948 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 213806954040 in words is "two hundred thirteen billion, eight hundred six million, nine hundred fifty-four thousand, forty".