21439153041234 has 32 divisors (see below), whose sum is σ = 44097753388416. Its totient is φ = 6943674481920.

The previous prime is 21439153041233. The next prime is 21439153041247. The reversal of 21439153041234 is 43214035193412.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21439153041233) 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, 66257287 + ... + 66580074.

It is an arithmetic number, because the mean of its divisors is an integer number (1378054793388).

Almost surely, 2^{21439153041234} is an apocalyptic number.

21439153041234 is an abundant number, since it is smaller than the sum of its proper divisors (22658600347182).

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

21439153041234 is a wasteful number, since it uses less digits than its factorization.

21439153041234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132838130.

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 21439153041234 in words is "twenty-one trillion, four hundred thirty-nine billion, one hundred fifty-three million, forty-one thousand, two hundred thirty-four".